Home / 129,011.66-178,035.38-72,423.02

Finding the Fourth Proportional to 129,011.66, 178,035.38 and 72,423.02

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Solution

The fourth proportional to 129,011.66, 178,035.38 and 72,423.02 is: 99,943.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,011.66 : 178,035.38 = 72,423.02 : x
  2. Step 2: Convert to fraction form
    129,011.66/178,035.38 = 72,423.02/x
  3. Step 3: Cross multiply
    129,011.66x = 178,035.38 × 72,423.02
  4. Step 4: Simplify right side
    129,011.66x = 12,893,859,886.45
  5. Step 5: Solve for x
    x = 12,893,859,886.45/129,011.66
  6. Step 6: Final answer
    x = 99,943.37

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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.