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Finding the Fourth Proportional to 112,119.76, 154,724.64 and 61,818.80

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Solution

The fourth proportional to 112,119.76, 154,724.64 and 61,818.80 is: 85,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,119.76 : 154,724.64 = 61,818.80 : x
  2. Step 2: Convert to fraction form
    112,119.76/154,724.64 = 61,818.80/x
  3. Step 3: Cross multiply
    112,119.76x = 154,724.64 × 61,818.80
  4. Step 4: Simplify right side
    112,119.76x = 9,564,891,575.23
  5. Step 5: Solve for x
    x = 9,564,891,575.23/112,119.76
  6. Step 6: Final answer
    x = 85,309.60

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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.