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Finding the Fourth Proportional to 99,012.80, 136,690.76 and 76,468.48

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Solution

The fourth proportional to 99,012.80, 136,690.76 and 76,468.48 is: 105,567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,012.80 : 136,690.76 = 76,468.48 : x
  2. Step 2: Convert to fraction form
    99,012.80/136,690.76 = 76,468.48/x
  3. Step 3: Cross multiply
    99,012.80x = 136,690.76 × 76,468.48
  4. Step 4: Simplify right side
    99,012.80x = 10,452,534,496.69
  5. Step 5: Solve for x
    x = 10,452,534,496.69/99,012.80
  6. Step 6: Final answer
    x = 105,567.50

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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.