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Finding the Fourth Proportional to 81,152.76, 121,734.64 and 24,989.40

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Solution

The fourth proportional to 81,152.76, 121,734.64 and 24,989.40 is: 37,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,152.76 : 121,734.64 = 24,989.40 : x
  2. Step 2: Convert to fraction form
    81,152.76/121,734.64 = 24,989.40/x
  3. Step 3: Cross multiply
    81,152.76x = 121,734.64 × 24,989.40
  4. Step 4: Simplify right side
    81,152.76x = 3,042,075,612.82
  5. Step 5: Solve for x
    x = 3,042,075,612.82/81,152.76
  6. Step 6: Final answer
    x = 37,485.79

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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.