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Finding the Fourth Proportional to 125,514.60, 188,271.90 and 42,407.40

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Solution

The fourth proportional to 125,514.60, 188,271.90 and 42,407.40 is: 63,611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,514.60 : 188,271.90 = 42,407.40 : x
  2. Step 2: Convert to fraction form
    125,514.60/188,271.90 = 42,407.40/x
  3. Step 3: Cross multiply
    125,514.60x = 188,271.90 × 42,407.40
  4. Step 4: Simplify right side
    125,514.60x = 7,984,121,772.06
  5. Step 5: Solve for x
    x = 7,984,121,772.06/125,514.60
  6. Step 6: Final answer
    x = 63,611.10

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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.