Home / 100,677.84-138,931.92-64,869.36

Finding the Fourth Proportional to 100,677.84, 138,931.92 and 64,869.36

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Solution

The fourth proportional to 100,677.84, 138,931.92 and 64,869.36 is: 89,517.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,677.84 : 138,931.92 = 64,869.36 : x
  2. Step 2: Convert to fraction form
    100,677.84/138,931.92 = 64,869.36/x
  3. Step 3: Cross multiply
    100,677.84x = 138,931.92 × 64,869.36
  4. Step 4: Simplify right side
    100,677.84x = 9,012,424,733.97
  5. Step 5: Solve for x
    x = 9,012,424,733.97/100,677.84
  6. Step 6: Final answer
    x = 89,517.46

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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.