Home / 78,947.78-118,446.95-28,312.69

Finding the Fourth Proportional to 78,947.78, 118,446.95 and 28,312.69

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Solution

The fourth proportional to 78,947.78, 118,446.95 and 28,312.69 is: 42,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.78 : 118,446.95 = 28,312.69 : x
  2. Step 2: Convert to fraction form
    78,947.78/118,446.95 = 28,312.69/x
  3. Step 3: Cross multiply
    78,947.78x = 118,446.95 × 28,312.69
  4. Step 4: Simplify right side
    78,947.78x = 3,353,551,776.80
  5. Step 5: Solve for x
    x = 3,353,551,776.80/78,947.78
  6. Step 6: Final answer
    x = 42,478.10

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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.