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Finding the Fourth Proportional to 138,688.60, 208,032.90 and 58,739.17

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Solution

The fourth proportional to 138,688.60, 208,032.90 and 58,739.17 is: 88,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,688.60 : 208,032.90 = 58,739.17 : x
  2. Step 2: Convert to fraction form
    138,688.60/208,032.90 = 58,739.17/x
  3. Step 3: Cross multiply
    138,688.60x = 208,032.90 × 58,739.17
  4. Step 4: Simplify right side
    138,688.60x = 12,219,679,878.69
  5. Step 5: Solve for x
    x = 12,219,679,878.69/138,688.60
  6. Step 6: Final answer
    x = 88,108.76

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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.