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Finding the Fourth Proportional to 100,955.97, 139,312.58 and 60,645.87

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Solution

The fourth proportional to 100,955.97, 139,312.58 and 60,645.87 is: 83,687.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,955.97 : 139,312.58 = 60,645.87 : x
  2. Step 2: Convert to fraction form
    100,955.97/139,312.58 = 60,645.87/x
  3. Step 3: Cross multiply
    100,955.97x = 139,312.58 × 60,645.87
  4. Step 4: Simplify right side
    100,955.97x = 8,448,732,312.82
  5. Step 5: Solve for x
    x = 8,448,732,312.82/100,955.97
  6. Step 6: Final answer
    x = 83,687.30

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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.