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Finding the Fourth Proportional to 78,800.10, 118,070.55 and 65,580.90

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Solution

The fourth proportional to 78,800.10, 118,070.55 and 65,580.90 is: 98,263.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.10 : 118,070.55 = 65,580.90 : x
  2. Step 2: Convert to fraction form
    78,800.10/118,070.55 = 65,580.90/x
  3. Step 3: Cross multiply
    78,800.10x = 118,070.55 × 65,580.90
  4. Step 4: Simplify right side
    78,800.10x = 7,743,172,932.50
  5. Step 5: Solve for x
    x = 7,743,172,932.50/78,800.10
  6. Step 6: Final answer
    x = 98,263.49

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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.