Home / 216,709,359.75-299,058,016.55-128,675,825.19

Finding the Fourth Proportional to 216,709,359.75, 299,058,016.55 and 128,675,825.19

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Solution

The fourth proportional to 216,709,359.75, 299,058,016.55 and 128,675,825.19 is: 177,572,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,709,359.75 : 299,058,016.55 = 128,675,825.19 : x
  2. Step 2: Convert to fraction form
    216,709,359.75/299,058,016.55 = 128,675,825.19/x
  3. Step 3: Cross multiply
    216,709,359.75x = 299,058,016.55 × 128,675,825.19
  4. Step 4: Simplify right side
    216,709,359.75x = 38,481,537,058,612,552
  5. Step 5: Solve for x
    x = 38,481,537,058,612,552/216,709,359.75
  6. Step 6: Final answer
    x = 177,572,104.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.