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Finding the Fourth Proportional to 72,097.62, 99,541.48 and 64,530.80

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Solution

The fourth proportional to 72,097.62, 99,541.48 and 64,530.80 is: 89,094.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,097.62 : 99,541.48 = 64,530.80 : x
  2. Step 2: Convert to fraction form
    72,097.62/99,541.48 = 64,530.80/x
  3. Step 3: Cross multiply
    72,097.62x = 99,541.48 × 64,530.80
  4. Step 4: Simplify right side
    72,097.62x = 6,423,491,337.58
  5. Step 5: Solve for x
    x = 6,423,491,337.58/72,097.62
  6. Step 6: Final answer
    x = 89,094.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.