Home / 65,868.48-90,716.08-56,913.12

Finding the Fourth Proportional to 65,868.48, 90,716.08 and 56,913.12

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Solution

The fourth proportional to 65,868.48, 90,716.08 and 56,913.12 is: 78,382.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,868.48 : 90,716.08 = 56,913.12 : x
  2. Step 2: Convert to fraction form
    65,868.48/90,716.08 = 56,913.12/x
  3. Step 3: Cross multiply
    65,868.48x = 90,716.08 × 56,913.12
  4. Step 4: Simplify right side
    65,868.48x = 5,162,935,146.97
  5. Step 5: Solve for x
    x = 5,162,935,146.97/65,868.48
  6. Step 6: Final answer
    x = 78,382.49

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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.