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Finding the Fourth Proportional to 143,464.80, 215,132.40 and 64,538.40

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Solution

The fourth proportional to 143,464.80, 215,132.40 and 64,538.40 is: 96,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,464.80 : 215,132.40 = 64,538.40 : x
  2. Step 2: Convert to fraction form
    143,464.80/215,132.40 = 64,538.40/x
  3. Step 3: Cross multiply
    143,464.80x = 215,132.40 × 64,538.40
  4. Step 4: Simplify right side
    143,464.80x = 13,884,300,884.16
  5. Step 5: Solve for x
    x = 13,884,300,884.16/143,464.80
  6. Step 6: Final answer
    x = 96,778.45

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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.