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Finding the Fourth Proportional to 88,720.40, 133,080.60 and 42,064.40

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Solution

The fourth proportional to 88,720.40, 133,080.60 and 42,064.40 is: 63,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,720.40 : 133,080.60 = 42,064.40 : x
  2. Step 2: Convert to fraction form
    88,720.40/133,080.60 = 42,064.40/x
  3. Step 3: Cross multiply
    88,720.40x = 133,080.60 × 42,064.40
  4. Step 4: Simplify right side
    88,720.40x = 5,597,955,590.64
  5. Step 5: Solve for x
    x = 5,597,955,590.64/88,720.40
  6. Step 6: Final answer
    x = 63,096.60

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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.