Home / 124,487.12-171,789.99-72,809.21

Finding the Fourth Proportional to 124,487.12, 171,789.99 and 72,809.21

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Solution

The fourth proportional to 124,487.12, 171,789.99 and 72,809.21 is: 100,475.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,487.12 : 171,789.99 = 72,809.21 : x
  2. Step 2: Convert to fraction form
    124,487.12/171,789.99 = 72,809.21/x
  3. Step 3: Cross multiply
    124,487.12x = 171,789.99 × 72,809.21
  4. Step 4: Simplify right side
    124,487.12x = 12,507,892,598.86
  5. Step 5: Solve for x
    x = 12,507,892,598.86/124,487.12
  6. Step 6: Final answer
    x = 100,475.40

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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.