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Finding the Fourth Proportional to 124,315.30, 186,472.95 and 77,076.10

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Solution

The fourth proportional to 124,315.30, 186,472.95 and 77,076.10 is: 115,614.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,315.30 : 186,472.95 = 77,076.10 : x
  2. Step 2: Convert to fraction form
    124,315.30/186,472.95 = 77,076.10/x
  3. Step 3: Cross multiply
    124,315.30x = 186,472.95 × 77,076.10
  4. Step 4: Simplify right side
    124,315.30x = 14,372,607,741.50
  5. Step 5: Solve for x
    x = 14,372,607,741.50/124,315.30
  6. Step 6: Final answer
    x = 115,614.15

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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.