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Finding the Fourth Proportional to 124,697.80, 172,083.99 and 70,986.30

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Solution

The fourth proportional to 124,697.80, 172,083.99 and 70,986.30 is: 97,961.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,697.80 : 172,083.99 = 70,986.30 : x
  2. Step 2: Convert to fraction form
    124,697.80/172,083.99 = 70,986.30/x
  3. Step 3: Cross multiply
    124,697.80x = 172,083.99 × 70,986.30
  4. Step 4: Simplify right side
    124,697.80x = 12,215,605,739.34
  5. Step 5: Solve for x
    x = 12,215,605,739.34/124,697.80
  6. Step 6: Final answer
    x = 97,961.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.