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Finding the Fourth Proportional to 125,520.64, 188,324.16 and 78,718.72

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Solution

The fourth proportional to 125,520.64, 188,324.16 and 78,718.72 is: 118,105.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,520.64 : 188,324.16 = 78,718.72 : x
  2. Step 2: Convert to fraction form
    125,520.64/188,324.16 = 78,718.72/x
  3. Step 3: Cross multiply
    125,520.64x = 188,324.16 × 78,718.72
  4. Step 4: Simplify right side
    125,520.64x = 14,824,636,820.28
  5. Step 5: Solve for x
    x = 14,824,636,820.28/125,520.64
  6. Step 6: Final answer
    x = 118,105.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.