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Finding the Fourth Proportional to 69,159.60, 103,739.40 and 42,915.60

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Solution

The fourth proportional to 69,159.60, 103,739.40 and 42,915.60 is: 64,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,159.60 : 103,739.40 = 42,915.60 : x
  2. Step 2: Convert to fraction form
    69,159.60/103,739.40 = 42,915.60/x
  3. Step 3: Cross multiply
    69,159.60x = 103,739.40 × 42,915.60
  4. Step 4: Simplify right side
    69,159.60x = 4,452,038,594.64
  5. Step 5: Solve for x
    x = 4,452,038,594.64/69,159.60
  6. Step 6: Final answer
    x = 64,373.40

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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.