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Finding the Fourth Proportional to 97,419.40, 146,129.10 and 81,016.90

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Solution

The fourth proportional to 97,419.40, 146,129.10 and 81,016.90 is: 121,525.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,419.40 : 146,129.10 = 81,016.90 : x
  2. Step 2: Convert to fraction form
    97,419.40/146,129.10 = 81,016.90/x
  3. Step 3: Cross multiply
    97,419.40x = 146,129.10 × 81,016.90
  4. Step 4: Simplify right side
    97,419.40x = 11,838,926,681.79
  5. Step 5: Solve for x
    x = 11,838,926,681.79/97,419.40
  6. Step 6: Final answer
    x = 121,525.35

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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.