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Finding the Fourth Proportional to 129,013.74, 178,037.73 and 72,424.71

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Solution

The fourth proportional to 129,013.74, 178,037.73 and 72,424.71 is: 99,945.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,013.74 : 178,037.73 = 72,424.71 : x
  2. Step 2: Convert to fraction form
    129,013.74/178,037.73 = 72,424.71/x
  3. Step 3: Cross multiply
    129,013.74x = 178,037.73 × 72,424.71
  4. Step 4: Simplify right side
    129,013.74x = 12,894,330,964.31
  5. Step 5: Solve for x
    x = 12,894,330,964.31/129,013.74
  6. Step 6: Final answer
    x = 99,945.41

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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.