Home / 98,462.16-135,640.71-78,312.60

Finding the Fourth Proportional to 98,462.16, 135,640.71 and 78,312.60

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Solution

The fourth proportional to 98,462.16, 135,640.71 and 78,312.60 is: 107,882.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,462.16 : 135,640.71 = 78,312.60 : x
  2. Step 2: Convert to fraction form
    98,462.16/135,640.71 = 78,312.60/x
  3. Step 3: Cross multiply
    98,462.16x = 135,640.71 × 78,312.60
  4. Step 4: Simplify right side
    98,462.16x = 10,622,376,665.95
  5. Step 5: Solve for x
    x = 10,622,376,665.95/98,462.16
  6. Step 6: Final answer
    x = 107,882.83

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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.