Home / 78,432.76-117,672.23-28,512.07

Finding the Fourth Proportional to 78,432.76, 117,672.23 and 28,512.07

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Solution

The fourth proportional to 78,432.76, 117,672.23 and 28,512.07 is: 42,776.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.76 : 117,672.23 = 28,512.07 : x
  2. Step 2: Convert to fraction form
    78,432.76/117,672.23 = 28,512.07/x
  3. Step 3: Cross multiply
    78,432.76x = 117,672.23 × 28,512.07
  4. Step 4: Simplify right side
    78,432.76x = 3,355,078,127.89
  5. Step 5: Solve for x
    x = 3,355,078,127.89/78,432.76
  6. Step 6: Final answer
    x = 42,776.49

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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.