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Finding the Fourth Proportional to 136,683.40, 205,025.10 and 83,921.80

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Solution

The fourth proportional to 136,683.40, 205,025.10 and 83,921.80 is: 125,882.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,683.40 : 205,025.10 = 83,921.80 : x
  2. Step 2: Convert to fraction form
    136,683.40/205,025.10 = 83,921.80/x
  3. Step 3: Cross multiply
    136,683.40x = 205,025.10 × 83,921.80
  4. Step 4: Simplify right side
    136,683.40x = 17,206,075,437.18
  5. Step 5: Solve for x
    x = 17,206,075,437.18/136,683.40
  6. Step 6: Final answer
    x = 125,882.70

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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.