Home / 137,430.32-189,649.88-80,082.32

Finding the Fourth Proportional to 137,430.32, 189,649.88 and 80,082.32

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Solution

The fourth proportional to 137,430.32, 189,649.88 and 80,082.32 is: 110,511.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,430.32 : 189,649.88 = 80,082.32 : x
  2. Step 2: Convert to fraction form
    137,430.32/189,649.88 = 80,082.32/x
  3. Step 3: Cross multiply
    137,430.32x = 189,649.88 × 80,082.32
  4. Step 4: Simplify right side
    137,430.32x = 15,187,602,378.12
  5. Step 5: Solve for x
    x = 15,187,602,378.12/137,430.32
  6. Step 6: Final answer
    x = 110,511.29

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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.