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Finding the Fourth Proportional to 64,663.79, 89,248.31 and 40,475.98

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Solution

The fourth proportional to 64,663.79, 89,248.31 and 40,475.98 is: 55,864.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,663.79 : 89,248.31 = 40,475.98 : x
  2. Step 2: Convert to fraction form
    64,663.79/89,248.31 = 40,475.98/x
  3. Step 3: Cross multiply
    64,663.79x = 89,248.31 × 40,475.98
  4. Step 4: Simplify right side
    64,663.79x = 3,612,412,810.59
  5. Step 5: Solve for x
    x = 3,612,412,810.59/64,663.79
  6. Step 6: Final answer
    x = 55,864.54

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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.