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Finding the Fourth Proportional to 65,870.96, 98,612.64 and 40,830.62

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Solution

The fourth proportional to 65,870.96, 98,612.64 and 40,830.62 is: 61,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,870.96 : 98,612.64 = 40,830.62 : x
  2. Step 2: Convert to fraction form
    65,870.96/98,612.64 = 40,830.62/x
  3. Step 3: Cross multiply
    65,870.96x = 98,612.64 × 40,830.62
  4. Step 4: Simplify right side
    65,870.96x = 4,026,414,737.97
  5. Step 5: Solve for x
    x = 4,026,414,737.97/65,870.96
  6. Step 6: Final answer
    x = 61,125.80

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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.