Home / 56,955.12-78,519-49,081.20

Finding the Fourth Proportional to 56,955.12, 78,519 and 49,081.20

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Solution

The fourth proportional to 56,955.12, 78,519 and 49,081.20 is: 67,663.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,955.12 : 78,519 = 49,081.20 : x
  2. Step 2: Convert to fraction form
    56,955.12/78,519 = 49,081.20/x
  3. Step 3: Cross multiply
    56,955.12x = 78,519 × 49,081.20
  4. Step 4: Simplify right side
    56,955.12x = 3,853,806,742.80
  5. Step 5: Solve for x
    x = 3,853,806,742.80/56,955.12
  6. Step 6: Final answer
    x = 67,663.92

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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.