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Finding the Fourth Proportional to 77,187.60, 106,539.84 and 45,366.72

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Solution

The fourth proportional to 77,187.60, 106,539.84 and 45,366.72 is: 62,618.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,187.60 : 106,539.84 = 45,366.72 : x
  2. Step 2: Convert to fraction form
    77,187.60/106,539.84 = 45,366.72/x
  3. Step 3: Cross multiply
    77,187.60x = 106,539.84 × 45,366.72
  4. Step 4: Simplify right side
    77,187.60x = 4,833,363,090.12
  5. Step 5: Solve for x
    x = 4,833,363,090.12/77,187.60
  6. Step 6: Final answer
    x = 62,618.39

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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.