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Finding the Fourth Proportional to 151,339.61, 208,848.65 and 87,714.32

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Solution

The fourth proportional to 151,339.61, 208,848.65 and 87,714.32 is: 121,045.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,339.61 : 208,848.65 = 87,714.32 : x
  2. Step 2: Convert to fraction form
    151,339.61/208,848.65 = 87,714.32/x
  3. Step 3: Cross multiply
    151,339.61x = 208,848.65 × 87,714.32
  4. Step 4: Simplify right side
    151,339.61x = 18,319,015,834.85
  5. Step 5: Solve for x
    x = 18,319,015,834.85/151,339.61
  6. Step 6: Final answer
    x = 121,045.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.