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Finding the Fourth Proportional to 99,679.12, 137,550.24 and 56,078.24

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Solution

The fourth proportional to 99,679.12, 137,550.24 and 56,078.24 is: 77,384.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,679.12 : 137,550.24 = 56,078.24 : x
  2. Step 2: Convert to fraction form
    99,679.12/137,550.24 = 56,078.24/x
  3. Step 3: Cross multiply
    99,679.12x = 137,550.24 × 56,078.24
  4. Step 4: Simplify right side
    99,679.12x = 7,713,575,370.78
  5. Step 5: Solve for x
    x = 7,713,575,370.78/99,679.12
  6. Step 6: Final answer
    x = 77,384.06

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1.5x scale

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.