Home / 138,634.59-191,315.36-74,972.39

Finding the Fourth Proportional to 138,634.59, 191,315.36 and 74,972.39

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Solution

The fourth proportional to 138,634.59, 191,315.36 and 74,972.39 is: 103,461.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,634.59 : 191,315.36 = 74,972.39 : x
  2. Step 2: Convert to fraction form
    138,634.59/191,315.36 = 74,972.39/x
  3. Step 3: Cross multiply
    138,634.59x = 191,315.36 × 74,972.39
  4. Step 4: Simplify right side
    138,634.59x = 14,343,369,782.91
  5. Step 5: Solve for x
    x = 14,343,369,782.91/138,634.59
  6. Step 6: Final answer
    x = 103,461.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.