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Finding the Fourth Proportional to 70,508.76, 105,622.14 and 42,413.28

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Solution

The fourth proportional to 70,508.76, 105,622.14 and 42,413.28 is: 63,535.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,508.76 : 105,622.14 = 42,413.28 : x
  2. Step 2: Convert to fraction form
    70,508.76/105,622.14 = 42,413.28/x
  3. Step 3: Cross multiply
    70,508.76x = 105,622.14 × 42,413.28
  4. Step 4: Simplify right side
    70,508.76x = 4,479,781,398.02
  5. Step 5: Solve for x
    x = 4,479,781,398.02/70,508.76
  6. Step 6: Final answer
    x = 63,535.10

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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.