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Finding the Fourth Proportional to 191,587.80, 287,381.70 and 125,232.60

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Solution

The fourth proportional to 191,587.80, 287,381.70 and 125,232.60 is: 187,848.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,587.80 : 287,381.70 = 125,232.60 : x
  2. Step 2: Convert to fraction form
    191,587.80/287,381.70 = 125,232.60/x
  3. Step 3: Cross multiply
    191,587.80x = 287,381.70 × 125,232.60
  4. Step 4: Simplify right side
    191,587.80x = 35,989,557,483.42
  5. Step 5: Solve for x
    x = 35,989,557,483.42/191,587.80
  6. Step 6: Final answer
    x = 187,848.90

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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.