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Finding the Fourth Proportional to 78,158.60, 107,907.78 and 60,219.56

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Solution

The fourth proportional to 78,158.60, 107,907.78 and 60,219.56 is: 83,140.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,158.60 : 107,907.78 = 60,219.56 : x
  2. Step 2: Convert to fraction form
    78,158.60/107,907.78 = 60,219.56/x
  3. Step 3: Cross multiply
    78,158.60x = 107,907.78 × 60,219.56
  4. Step 4: Simplify right side
    78,158.60x = 6,498,159,032.18
  5. Step 5: Solve for x
    x = 6,498,159,032.18/78,158.60
  6. Step 6: Final answer
    x = 83,140.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.