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Finding the Fourth Proportional to 169,639.40, 254,459.10 and 86,522.60

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Solution

The fourth proportional to 169,639.40, 254,459.10 and 86,522.60 is: 129,783.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,639.40 : 254,459.10 = 86,522.60 : x
  2. Step 2: Convert to fraction form
    169,639.40/254,459.10 = 86,522.60/x
  3. Step 3: Cross multiply
    169,639.40x = 254,459.10 × 86,522.60
  4. Step 4: Simplify right side
    169,639.40x = 22,016,462,925.66
  5. Step 5: Solve for x
    x = 22,016,462,925.66/169,639.40
  6. Step 6: Final answer
    x = 129,783.90

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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.