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Finding the Fourth Proportional to 64,139.50, 88,511.88 and 35,459.90

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Solution

The fourth proportional to 64,139.50, 88,511.88 and 35,459.90 is: 48,934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,139.50 : 88,511.88 = 35,459.90 : x
  2. Step 2: Convert to fraction form
    64,139.50/88,511.88 = 35,459.90/x
  3. Step 3: Cross multiply
    64,139.50x = 88,511.88 × 35,459.90
  4. Step 4: Simplify right side
    64,139.50x = 3,138,622,413.61
  5. Step 5: Solve for x
    x = 3,138,622,413.61/64,139.50
  6. Step 6: Final answer
    x = 48,934.31

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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.