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Finding the Fourth Proportional to 125,145.64, 187,827.81 and 72,482.68

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Solution

The fourth proportional to 125,145.64, 187,827.81 and 72,482.68 is: 108,787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,145.64 : 187,827.81 = 72,482.68 : x
  2. Step 2: Convert to fraction form
    125,145.64/187,827.81 = 72,482.68/x
  3. Step 3: Cross multiply
    125,145.64x = 187,827.81 × 72,482.68
  4. Step 4: Simplify right side
    125,145.64x = 13,614,263,047.33
  5. Step 5: Solve for x
    x = 13,614,263,047.33/125,145.64
  6. Step 6: Final answer
    x = 108,787.35

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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.