Home / 78,750.20-118,125.30-43,320.80

Finding the Fourth Proportional to 78,750.20, 118,125.30 and 43,320.80

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Solution

The fourth proportional to 78,750.20, 118,125.30 and 43,320.80 is: 64,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,750.20 : 118,125.30 = 43,320.80 : x
  2. Step 2: Convert to fraction form
    78,750.20/118,125.30 = 43,320.80/x
  3. Step 3: Cross multiply
    78,750.20x = 118,125.30 × 43,320.80
  4. Step 4: Simplify right side
    78,750.20x = 5,117,282,496.24
  5. Step 5: Solve for x
    x = 5,117,282,496.24/78,750.20
  6. Step 6: Final answer
    x = 64,981.20

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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.