Home / 78,981.08-118,492.39-28,385.21

Finding the Fourth Proportional to 78,981.08, 118,492.39 and 28,385.21

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Solution

The fourth proportional to 78,981.08, 118,492.39 and 28,385.21 is: 42,585.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,981.08 : 118,492.39 = 28,385.21 : x
  2. Step 2: Convert to fraction form
    78,981.08/118,492.39 = 28,385.21/x
  3. Step 3: Cross multiply
    78,981.08x = 118,492.39 × 28,385.21
  4. Step 4: Simplify right side
    78,981.08x = 3,363,431,373.55
  5. Step 5: Solve for x
    x = 3,363,431,373.55/78,981.08
  6. Step 6: Final answer
    x = 42,585.28

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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.