Home / 81,430.32-112,381.08-45,620.10

Finding the Fourth Proportional to 81,430.32, 112,381.08 and 45,620.10

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Solution

The fourth proportional to 81,430.32, 112,381.08 and 45,620.10 is: 62,959.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.32 : 112,381.08 = 45,620.10 : x
  2. Step 2: Convert to fraction form
    81,430.32/112,381.08 = 45,620.10/x
  3. Step 3: Cross multiply
    81,430.32x = 112,381.08 × 45,620.10
  4. Step 4: Simplify right side
    81,430.32x = 5,126,836,107.71
  5. Step 5: Solve for x
    x = 5,126,836,107.71/81,430.32
  6. Step 6: Final answer
    x = 62,959.79

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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.