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Finding the Fourth Proportional to 86,703.80, 130,055.70 and 82,111.10

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Solution

The fourth proportional to 86,703.80, 130,055.70 and 82,111.10 is: 123,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,703.80 : 130,055.70 = 82,111.10 : x
  2. Step 2: Convert to fraction form
    86,703.80/130,055.70 = 82,111.10/x
  3. Step 3: Cross multiply
    86,703.80x = 130,055.70 × 82,111.10
  4. Step 4: Simplify right side
    86,703.80x = 10,679,016,588.27
  5. Step 5: Solve for x
    x = 10,679,016,588.27/86,703.80
  6. Step 6: Final answer
    x = 123,166.65

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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.