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Finding the Fourth Proportional to 136,908.80, 205,363.20 and 77,926.40

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Solution

The fourth proportional to 136,908.80, 205,363.20 and 77,926.40 is: 116,889.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,908.80 : 205,363.20 = 77,926.40 : x
  2. Step 2: Convert to fraction form
    136,908.80/205,363.20 = 77,926.40/x
  3. Step 3: Cross multiply
    136,908.80x = 205,363.20 × 77,926.40
  4. Step 4: Simplify right side
    136,908.80x = 16,003,214,868.48
  5. Step 5: Solve for x
    x = 16,003,214,868.48/136,908.80
  6. Step 6: Final answer
    x = 116,889.60

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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.