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Finding the Fourth Proportional to 99,012.60, 136,624.80 and 56,573.88

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Solution

The fourth proportional to 99,012.60, 136,624.80 and 56,573.88 is: 78,064.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,012.60 : 136,624.80 = 56,573.88 : x
  2. Step 2: Convert to fraction form
    99,012.60/136,624.80 = 56,573.88/x
  3. Step 3: Cross multiply
    99,012.60x = 136,624.80 × 56,573.88
  4. Step 4: Simplify right side
    99,012.60x = 7,729,395,040.22
  5. Step 5: Solve for x
    x = 7,729,395,040.22/99,012.60
  6. Step 6: Final answer
    x = 78,064.76

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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.