Home / 138,652.40-191,340.52-74,990.16

Finding the Fourth Proportional to 138,652.40, 191,340.52 and 74,990.16

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Solution

The fourth proportional to 138,652.40, 191,340.52 and 74,990.16 is: 103,486.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,652.40 : 191,340.52 = 74,990.16 : x
  2. Step 2: Convert to fraction form
    138,652.40/191,340.52 = 74,990.16/x
  3. Step 3: Cross multiply
    138,652.40x = 191,340.52 × 74,990.16
  4. Step 4: Simplify right side
    138,652.40x = 14,348,656,209.28
  5. Step 5: Solve for x
    x = 14,348,656,209.28/138,652.40
  6. Step 6: Final answer
    x = 103,486.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.