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Finding the Fourth Proportional to 125,311.43, 172,913.79 and 71,599.93

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Solution

The fourth proportional to 125,311.43, 172,913.79 and 71,599.93 is: 98,798.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,311.43 : 172,913.79 = 71,599.93 : x
  2. Step 2: Convert to fraction form
    125,311.43/172,913.79 = 71,599.93/x
  3. Step 3: Cross multiply
    125,311.43x = 172,913.79 × 71,599.93
  4. Step 4: Simplify right side
    125,311.43x = 12,380,615,096.25
  5. Step 5: Solve for x
    x = 12,380,615,096.25/125,311.43
  6. Step 6: Final answer
    x = 98,798.77

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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.