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Finding the Fourth Proportional to 191,925.40, 287,885.40 and 86,744.20

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Solution

The fourth proportional to 191,925.40, 287,885.40 and 86,744.20 is: 130,115.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,925.40 : 287,885.40 = 86,744.20 : x
  2. Step 2: Convert to fraction form
    191,925.40/287,885.40 = 86,744.20/x
  3. Step 3: Cross multiply
    191,925.40x = 287,885.40 × 86,744.20
  4. Step 4: Simplify right side
    191,925.40x = 24,972,388,714.68
  5. Step 5: Solve for x
    x = 24,972,388,714.68/191,925.40
  6. Step 6: Final answer
    x = 130,115.08

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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.