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Finding the Fourth Proportional to 391,138.84, 586,703.31 and 124,895.98

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Solution

The fourth proportional to 391,138.84, 586,703.31 and 124,895.98 is: 187,342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,138.84 : 586,703.31 = 124,895.98 : x
  2. Step 2: Convert to fraction form
    391,138.84/586,703.31 = 124,895.98/x
  3. Step 3: Cross multiply
    391,138.84x = 586,703.31 × 124,895.98
  4. Step 4: Simplify right side
    391,138.84x = 73,276,884,871.69
  5. Step 5: Solve for x
    x = 73,276,884,871.69/391,138.84
  6. Step 6: Final answer
    x = 187,342.39

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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.