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Finding the Fourth Proportional to 64,750.86, 89,349.75 and 47,764.28

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Solution

The fourth proportional to 64,750.86, 89,349.75 and 47,764.28 is: 65,909.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,750.86 : 89,349.75 = 47,764.28 : x
  2. Step 2: Convert to fraction form
    64,750.86/89,349.75 = 47,764.28/x
  3. Step 3: Cross multiply
    64,750.86x = 89,349.75 × 47,764.28
  4. Step 4: Simplify right side
    64,750.86x = 4,267,726,700.30
  5. Step 5: Solve for x
    x = 4,267,726,700.30/64,750.86
  6. Step 6: Final answer
    x = 65,909.96

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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.