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Finding the Fourth Proportional to 121,990.32, 183,048.12 and 92,398.32

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Solution

The fourth proportional to 121,990.32, 183,048.12 and 92,398.32 is: 138,644.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,990.32 : 183,048.12 = 92,398.32 : x
  2. Step 2: Convert to fraction form
    121,990.32/183,048.12 = 92,398.32/x
  3. Step 3: Cross multiply
    121,990.32x = 183,048.12 × 92,398.32
  4. Step 4: Simplify right side
    121,990.32x = 16,913,338,767.16
  5. Step 5: Solve for x
    x = 16,913,338,767.16/121,990.32
  6. Step 6: Final answer
    x = 138,644.93

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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.