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Finding the Fourth Proportional to 125,802.40, 188,649.84 and 42,658.72

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Solution

The fourth proportional to 125,802.40, 188,649.84 and 42,658.72 is: 63,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,802.40 : 188,649.84 = 42,658.72 : x
  2. Step 2: Convert to fraction form
    125,802.40/188,649.84 = 42,658.72/x
  3. Step 3: Cross multiply
    125,802.40x = 188,649.84 × 42,658.72
  4. Step 4: Simplify right side
    125,802.40x = 8,047,560,702.60
  5. Step 5: Solve for x
    x = 8,047,560,702.60/125,802.40
  6. Step 6: Final answer
    x = 63,969.85

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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.