Home / 128,617.30-177,498.30-77,629.24

Finding the Fourth Proportional to 128,617.30, 177,498.30 and 77,629.24

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Solution

The fourth proportional to 128,617.30, 177,498.30 and 77,629.24 is: 107,132.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,617.30 : 177,498.30 = 77,629.24 : x
  2. Step 2: Convert to fraction form
    128,617.30/177,498.30 = 77,629.24/x
  3. Step 3: Cross multiply
    128,617.30x = 177,498.30 × 77,629.24
  4. Step 4: Simplify right side
    128,617.30x = 13,779,058,130.29
  5. Step 5: Solve for x
    x = 13,779,058,130.29/128,617.30
  6. Step 6: Final answer
    x = 107,132.23

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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.