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Finding the Fourth Proportional to 125,913.96, 188,870.90 and 42,807.96

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Solution

The fourth proportional to 125,913.96, 188,870.90 and 42,807.96 is: 64,211.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,913.96 : 188,870.90 = 42,807.96 : x
  2. Step 2: Convert to fraction form
    125,913.96/188,870.90 = 42,807.96/x
  3. Step 3: Cross multiply
    125,913.96x = 188,870.90 × 42,807.96
  4. Step 4: Simplify right side
    125,913.96x = 8,085,177,718.32
  5. Step 5: Solve for x
    x = 8,085,177,718.32/125,913.96
  6. Step 6: Final answer
    x = 64,211.92

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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.