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Finding the Fourth Proportional to 125,987.46, 188,981.01 and 42,881.46

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Solution

The fourth proportional to 125,987.46, 188,981.01 and 42,881.46 is: 64,322.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,987.46 : 188,981.01 = 42,881.46 : x
  2. Step 2: Convert to fraction form
    125,987.46/188,981.01 = 42,881.46/x
  3. Step 3: Cross multiply
    125,987.46x = 188,981.01 × 42,881.46
  4. Step 4: Simplify right side
    125,987.46x = 8,103,781,621.07
  5. Step 5: Solve for x
    x = 8,103,781,621.07/125,987.46
  6. Step 6: Final answer
    x = 64,322.13

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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.