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Finding the Fourth Proportional to 65,386.60, 98,079.90 and 34,231.40

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Solution

The fourth proportional to 65,386.60, 98,079.90 and 34,231.40 is: 51,347.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,386.60 : 98,079.90 = 34,231.40 : x
  2. Step 2: Convert to fraction form
    65,386.60/98,079.90 = 34,231.40/x
  3. Step 3: Cross multiply
    65,386.60x = 98,079.90 × 34,231.40
  4. Step 4: Simplify right side
    65,386.60x = 3,357,412,288.86
  5. Step 5: Solve for x
    x = 3,357,412,288.86/65,386.60
  6. Step 6: Final answer
    x = 51,347.10

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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.