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Finding the Fourth Proportional to 78,756.85, 118,114.07 and 28,837.20

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Solution

The fourth proportional to 78,756.85, 118,114.07 and 28,837.20 is: 43,248.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756.85 : 118,114.07 = 28,837.20 : x
  2. Step 2: Convert to fraction form
    78,756.85/118,114.07 = 28,837.20/x
  3. Step 3: Cross multiply
    78,756.85x = 118,114.07 × 28,837.20
  4. Step 4: Simplify right side
    78,756.85x = 3,406,079,059.40
  5. Step 5: Solve for x
    x = 3,406,079,059.40/78,756.85
  6. Step 6: Final answer
    x = 43,248.04

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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.