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Finding the Fourth Proportional to 65,318.40, 97,758.90 and 57,445.20

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Solution

The fourth proportional to 65,318.40, 97,758.90 and 57,445.20 is: 85,975.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,318.40 : 97,758.90 = 57,445.20 : x
  2. Step 2: Convert to fraction form
    65,318.40/97,758.90 = 57,445.20/x
  3. Step 3: Cross multiply
    65,318.40x = 97,758.90 × 57,445.20
  4. Step 4: Simplify right side
    65,318.40x = 5,615,779,562.28
  5. Step 5: Solve for x
    x = 5,615,779,562.28/65,318.40
  6. Step 6: Final answer
    x = 85,975.46

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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.