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Finding the Fourth Proportional to 66,719.48, 99,407.58 and 65,757.20

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Solution

The fourth proportional to 66,719.48, 99,407.58 and 65,757.20 is: 97,973.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,719.48 : 99,407.58 = 65,757.20 : x
  2. Step 2: Convert to fraction form
    66,719.48/99,407.58 = 65,757.20/x
  3. Step 3: Cross multiply
    66,719.48x = 99,407.58 × 65,757.20
  4. Step 4: Simplify right side
    66,719.48x = 6,536,763,293.75
  5. Step 5: Solve for x
    x = 6,536,763,293.75/66,719.48
  6. Step 6: Final answer
    x = 97,973.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.