Home / 78,981.45-118,492.95-28,385.59

Finding the Fourth Proportional to 78,981.45, 118,492.95 and 28,385.59

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Solution

The fourth proportional to 78,981.45, 118,492.95 and 28,385.59 is: 42,585.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,981.45 : 118,492.95 = 28,385.59 : x
  2. Step 2: Convert to fraction form
    78,981.45/118,492.95 = 28,385.59/x
  3. Step 3: Cross multiply
    78,981.45x = 118,492.95 × 28,385.59
  4. Step 4: Simplify right side
    78,981.45x = 3,363,491,562.20
  5. Step 5: Solve for x
    x = 3,363,491,562.20/78,981.45
  6. Step 6: Final answer
    x = 42,585.84

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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.