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Finding the Fourth Proportional to 97,871.80, 146,807.70 and 90,873.40

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Solution

The fourth proportional to 97,871.80, 146,807.70 and 90,873.40 is: 136,310.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,871.80 : 146,807.70 = 90,873.40 : x
  2. Step 2: Convert to fraction form
    97,871.80/146,807.70 = 90,873.40/x
  3. Step 3: Cross multiply
    97,871.80x = 146,807.70 × 90,873.40
  4. Step 4: Simplify right side
    97,871.80x = 13,340,914,845.18
  5. Step 5: Solve for x
    x = 13,340,914,845.18/97,871.80
  6. Step 6: Final answer
    x = 136,310.10

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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.