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Finding the Fourth Proportional to 121,133.20, 181,699.80 and 87,696.40

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Solution

The fourth proportional to 121,133.20, 181,699.80 and 87,696.40 is: 131,544.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,133.20 : 181,699.80 = 87,696.40 : x
  2. Step 2: Convert to fraction form
    121,133.20/181,699.80 = 87,696.40/x
  3. Step 3: Cross multiply
    121,133.20x = 181,699.80 × 87,696.40
  4. Step 4: Simplify right side
    121,133.20x = 15,934,418,340.72
  5. Step 5: Solve for x
    x = 15,934,418,340.72/121,133.20
  6. Step 6: Final answer
    x = 131,544.60

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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.