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Finding the Fourth Proportional to 64,430, 88,923.12 and 39,294.08

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Solution

The fourth proportional to 64,430, 88,923.12 and 39,294.08 is: 54,231.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,430 : 88,923.12 = 39,294.08 : x
  2. Step 2: Convert to fraction form
    64,430/88,923.12 = 39,294.08/x
  3. Step 3: Cross multiply
    64,430x = 88,923.12 × 39,294.08
  4. Step 4: Simplify right side
    64,430x = 3,494,152,191.13
  5. Step 5: Solve for x
    x = 3,494,152,191.13/64,430
  6. Step 6: Final answer
    x = 54,231.76

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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.