Home / 138,897.55-191,710.07-78,503.23

Finding the Fourth Proportional to 138,897.55, 191,710.07 and 78,503.23

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Solution

The fourth proportional to 138,897.55, 191,710.07 and 78,503.23 is: 108,352.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,897.55 : 191,710.07 = 78,503.23 : x
  2. Step 2: Convert to fraction form
    138,897.55/191,710.07 = 78,503.23/x
  3. Step 3: Cross multiply
    138,897.55x = 191,710.07 × 78,503.23
  4. Step 4: Simplify right side
    138,897.55x = 15,049,859,718.53
  5. Step 5: Solve for x
    x = 15,049,859,718.53/138,897.55
  6. Step 6: Final answer
    x = 108,352.23

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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.