Home / 137,445.12-189,656.56-80,835.84

Finding the Fourth Proportional to 137,445.12, 189,656.56 and 80,835.84

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Solution

The fourth proportional to 137,445.12, 189,656.56 and 80,835.84 is: 111,543.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,445.12 : 189,656.56 = 80,835.84 : x
  2. Step 2: Convert to fraction form
    137,445.12/189,656.56 = 80,835.84/x
  3. Step 3: Cross multiply
    137,445.12x = 189,656.56 × 80,835.84
  4. Step 4: Simplify right side
    137,445.12x = 15,331,047,339.11
  5. Step 5: Solve for x
    x = 15,331,047,339.11/137,445.12
  6. Step 6: Final answer
    x = 111,543.05

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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.