Home / 128,525,805.09-177,370,696.55-72,011,038.50

Finding the Fourth Proportional to 128,525,805.09, 177,370,696.55 and 72,011,038.50

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Solution

The fourth proportional to 128,525,805.09, 177,370,696.55 and 72,011,038.50 is: 99,378,082.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525,805.09 : 177,370,696.55 = 72,011,038.50 : x
  2. Step 2: Convert to fraction form
    128,525,805.09/177,370,696.55 = 72,011,038.50/x
  3. Step 3: Cross multiply
    128,525,805.09x = 177,370,696.55 × 72,011,038.50
  4. Step 4: Simplify right side
    128,525,805.09x = 12,772,648,058,213,896
  5. Step 5: Solve for x
    x = 12,772,648,058,213,896/128,525,805.09
  6. Step 6: Final answer
    x = 99,378,082.47

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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.