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Finding the Fourth Proportional to 143,655.90, 215,410.03 and 77,151.96

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Solution

The fourth proportional to 143,655.90, 215,410.03 and 77,151.96 is: 115,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,655.90 : 215,410.03 = 77,151.96 : x
  2. Step 2: Convert to fraction form
    143,655.90/215,410.03 = 77,151.96/x
  3. Step 3: Cross multiply
    143,655.90x = 215,410.03 × 77,151.96
  4. Step 4: Simplify right side
    143,655.90x = 16,619,306,114.60
  5. Step 5: Solve for x
    x = 16,619,306,114.60/143,655.90
  6. Step 6: Final answer
    x = 115,688.30

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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.