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Finding the Fourth Proportional to 100,959.80, 151,439.70 and 99,647.60

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Solution

The fourth proportional to 100,959.80, 151,439.70 and 99,647.60 is: 149,471.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,959.80 : 151,439.70 = 99,647.60 : x
  2. Step 2: Convert to fraction form
    100,959.80/151,439.70 = 99,647.60/x
  3. Step 3: Cross multiply
    100,959.80x = 151,439.70 × 99,647.60
  4. Step 4: Simplify right side
    100,959.80x = 15,090,602,649.72
  5. Step 5: Solve for x
    x = 15,090,602,649.72/100,959.80
  6. Step 6: Final answer
    x = 149,471.40

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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.