Home / 138,543.12-191,189.46-74,880.92

Finding the Fourth Proportional to 138,543.12, 191,189.46 and 74,880.92

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Solution

The fourth proportional to 138,543.12, 191,189.46 and 74,880.92 is: 103,335.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,543.12 : 191,189.46 = 74,880.92 : x
  2. Step 2: Convert to fraction form
    138,543.12/191,189.46 = 74,880.92/x
  3. Step 3: Cross multiply
    138,543.12x = 191,189.46 × 74,880.92
  4. Step 4: Simplify right side
    138,543.12x = 14,316,442,137.44
  5. Step 5: Solve for x
    x = 14,316,442,137.44/138,543.12
  6. Step 6: Final answer
    x = 103,335.64

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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.