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Finding the Fourth Proportional to 125,970.30, 188,998.65 and 55,899.90

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Solution

The fourth proportional to 125,970.30, 188,998.65 and 55,899.90 is: 83,869.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,970.30 : 188,998.65 = 55,899.90 : x
  2. Step 2: Convert to fraction form
    125,970.30/188,998.65 = 55,899.90/x
  3. Step 3: Cross multiply
    125,970.30x = 188,998.65 × 55,899.90
  4. Step 4: Simplify right side
    125,970.30x = 10,565,005,635.14
  5. Step 5: Solve for x
    x = 10,565,005,635.14/125,970.30
  6. Step 6: Final answer
    x = 83,869.02

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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.