Home / 129,013.66-178,038.14-72,425.02

Finding the Fourth Proportional to 129,013.66, 178,038.14 and 72,425.02

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Solution

The fourth proportional to 129,013.66, 178,038.14 and 72,425.02 is: 99,946.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,013.66 : 178,038.14 = 72,425.02 : x
  2. Step 2: Convert to fraction form
    129,013.66/178,038.14 = 72,425.02/x
  3. Step 3: Cross multiply
    129,013.66x = 178,038.14 × 72,425.02
  4. Step 4: Simplify right side
    129,013.66x = 12,894,415,850.26
  5. Step 5: Solve for x
    x = 12,894,415,850.26/129,013.66
  6. Step 6: Final answer
    x = 99,946.13

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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.