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Finding the Fourth Proportional to 125,152.71, 172,709.70 and 67,790.70

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Solution

The fourth proportional to 125,152.71, 172,709.70 and 67,790.70 is: 93,550.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,152.71 : 172,709.70 = 67,790.70 : x
  2. Step 2: Convert to fraction form
    125,152.71/172,709.70 = 67,790.70/x
  3. Step 3: Cross multiply
    125,152.71x = 172,709.70 × 67,790.70
  4. Step 4: Simplify right side
    125,152.71x = 11,708,111,459.79
  5. Step 5: Solve for x
    x = 11,708,111,459.79/125,152.71
  6. Step 6: Final answer
    x = 93,550.60

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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.