Home / 78,288.22-117,432.01-28,356.63

Finding the Fourth Proportional to 78,288.22, 117,432.01 and 28,356.63

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Solution

The fourth proportional to 78,288.22, 117,432.01 and 28,356.63 is: 42,534.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,288.22 : 117,432.01 = 28,356.63 : x
  2. Step 2: Convert to fraction form
    78,288.22/117,432.01 = 28,356.63/x
  3. Step 3: Cross multiply
    78,288.22x = 117,432.01 × 28,356.63
  4. Step 4: Simplify right side
    78,288.22x = 3,329,976,128.62
  5. Step 5: Solve for x
    x = 3,329,976,128.62/78,288.22
  6. Step 6: Final answer
    x = 42,534.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.