Home / 129,371.02-178,459.08-77,674.90

Finding the Fourth Proportional to 129,371.02, 178,459.08 and 77,674.90

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Solution

The fourth proportional to 129,371.02, 178,459.08 and 77,674.90 is: 107,147.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,371.02 : 178,459.08 = 77,674.90 : x
  2. Step 2: Convert to fraction form
    129,371.02/178,459.08 = 77,674.90/x
  3. Step 3: Cross multiply
    129,371.02x = 178,459.08 × 77,674.90
  4. Step 4: Simplify right side
    129,371.02x = 13,861,791,193.09
  5. Step 5: Solve for x
    x = 13,861,791,193.09/129,371.02
  6. Step 6: Final answer
    x = 107,147.58

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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.