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Finding the Fourth Proportional to 86,999.10, 130,498.65 and 82,916.70

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Solution

The fourth proportional to 86,999.10, 130,498.65 and 82,916.70 is: 124,375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.10 : 130,498.65 = 82,916.70 : x
  2. Step 2: Convert to fraction form
    86,999.10/130,498.65 = 82,916.70/x
  3. Step 3: Cross multiply
    86,999.10x = 130,498.65 × 82,916.70
  4. Step 4: Simplify right side
    86,999.10x = 10,820,517,412.46
  5. Step 5: Solve for x
    x = 10,820,517,412.46/86,999.10
  6. Step 6: Final answer
    x = 124,375.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.