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Finding the Fourth Proportional to 169,686.90, 254,530.35 and 86,570.10

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Solution

The fourth proportional to 169,686.90, 254,530.35 and 86,570.10 is: 129,855.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,686.90 : 254,530.35 = 86,570.10 : x
  2. Step 2: Convert to fraction form
    169,686.90/254,530.35 = 86,570.10/x
  3. Step 3: Cross multiply
    169,686.90x = 254,530.35 × 86,570.10
  4. Step 4: Simplify right side
    169,686.90x = 22,034,717,852.54
  5. Step 5: Solve for x
    x = 22,034,717,852.54/169,686.90
  6. Step 6: Final answer
    x = 129,855.15

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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.