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Finding the Fourth Proportional to 98,697.80, 148,161.90 and 56,611.40

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Solution

The fourth proportional to 98,697.80, 148,161.90 and 56,611.40 is: 84,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,697.80 : 148,161.90 = 56,611.40 : x
  2. Step 2: Convert to fraction form
    98,697.80/148,161.90 = 56,611.40/x
  3. Step 3: Cross multiply
    98,697.80x = 148,161.90 × 56,611.40
  4. Step 4: Simplify right side
    98,697.80x = 8,387,652,585.66
  5. Step 5: Solve for x
    x = 8,387,652,585.66/98,697.80
  6. Step 6: Final answer
    x = 84,983.18

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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.