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Finding the Fourth Proportional to 85,602.92, 128,357.98 and 47,663.88

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Solution

The fourth proportional to 85,602.92, 128,357.98 and 47,663.88 is: 71,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,602.92 : 128,357.98 = 47,663.88 : x
  2. Step 2: Convert to fraction form
    85,602.92/128,357.98 = 47,663.88/x
  3. Step 3: Cross multiply
    85,602.92x = 128,357.98 × 47,663.88
  4. Step 4: Simplify right side
    85,602.92x = 6,118,039,355.76
  5. Step 5: Solve for x
    x = 6,118,039,355.76/85,602.92
  6. Step 6: Final answer
    x = 71,469.98

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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.