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Finding the Fourth Proportional to 78,801.90, 118,202.85 and 77,246.70

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Solution

The fourth proportional to 78,801.90, 118,202.85 and 77,246.70 is: 115,870.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,801.90 : 118,202.85 = 77,246.70 : x
  2. Step 2: Convert to fraction form
    78,801.90/118,202.85 = 77,246.70/x
  3. Step 3: Cross multiply
    78,801.90x = 118,202.85 × 77,246.70
  4. Step 4: Simplify right side
    78,801.90x = 9,130,780,093.10
  5. Step 5: Solve for x
    x = 9,130,780,093.10/78,801.90
  6. Step 6: Final answer
    x = 115,870.05

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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.