Home / 129,386.64-178,510.86-105,472.20

Finding the Fourth Proportional to 129,386.64, 178,510.86 and 105,472.20

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Solution

The fourth proportional to 129,386.64, 178,510.86 and 105,472.20 is: 145,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,386.64 : 178,510.86 = 105,472.20 : x
  2. Step 2: Convert to fraction form
    129,386.64/178,510.86 = 105,472.20/x
  3. Step 3: Cross multiply
    129,386.64x = 178,510.86 × 105,472.20
  4. Step 4: Simplify right side
    129,386.64x = 18,827,933,128.09
  5. Step 5: Solve for x
    x = 18,827,933,128.09/129,386.64
  6. Step 6: Final answer
    x = 145,516.83

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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.