Home / 139,314.95-192,255.36-78,897.35

Finding the Fourth Proportional to 139,314.95, 192,255.36 and 78,897.35

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Solution

The fourth proportional to 139,314.95, 192,255.36 and 78,897.35 is: 108,878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,314.95 : 192,255.36 = 78,897.35 : x
  2. Step 2: Convert to fraction form
    139,314.95/192,255.36 = 78,897.35/x
  3. Step 3: Cross multiply
    139,314.95x = 192,255.36 × 78,897.35
  4. Step 4: Simplify right side
    139,314.95x = 15,168,438,404.20
  5. Step 5: Solve for x
    x = 15,168,438,404.20/139,314.95
  6. Step 6: Final answer
    x = 108,878.76

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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.