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Finding the Fourth Proportional to 136,886.80, 205,330.20 and 77,904.40

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Solution

The fourth proportional to 136,886.80, 205,330.20 and 77,904.40 is: 116,856.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,886.80 : 205,330.20 = 77,904.40 : x
  2. Step 2: Convert to fraction form
    136,886.80/205,330.20 = 77,904.40/x
  3. Step 3: Cross multiply
    136,886.80x = 205,330.20 × 77,904.40
  4. Step 4: Simplify right side
    136,886.80x = 15,996,126,032.88
  5. Step 5: Solve for x
    x = 15,996,126,032.88/136,886.80
  6. Step 6: Final answer
    x = 116,856.60

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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.