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Finding the Fourth Proportional to 89,771.60, 134,495.40 and 42,921.20

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Solution

The fourth proportional to 89,771.60, 134,495.40 and 42,921.20 is: 64,304.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,771.60 : 134,495.40 = 42,921.20 : x
  2. Step 2: Convert to fraction form
    89,771.60/134,495.40 = 42,921.20/x
  3. Step 3: Cross multiply
    89,771.60x = 134,495.40 × 42,921.20
  4. Step 4: Simplify right side
    89,771.60x = 5,772,703,962.48
  5. Step 5: Solve for x
    x = 5,772,703,962.48/89,771.60
  6. Step 6: Final answer
    x = 64,304.35

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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.