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Finding the Fourth Proportional to 99,573.80, 149,360.70 and 91,970.60

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Solution

The fourth proportional to 99,573.80, 149,360.70 and 91,970.60 is: 137,955.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,573.80 : 149,360.70 = 91,970.60 : x
  2. Step 2: Convert to fraction form
    99,573.80/149,360.70 = 91,970.60/x
  3. Step 3: Cross multiply
    99,573.80x = 149,360.70 × 91,970.60
  4. Step 4: Simplify right side
    99,573.80x = 13,736,793,195.42
  5. Step 5: Solve for x
    x = 13,736,793,195.42/99,573.80
  6. Step 6: Final answer
    x = 137,955.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.