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Finding the Fourth Proportional to 147,756.80, 221,489.40 and 72,815.60

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Solution

The fourth proportional to 147,756.80, 221,489.40 and 72,815.60 is: 109,151.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,756.80 : 221,489.40 = 72,815.60 : x
  2. Step 2: Convert to fraction form
    147,756.80/221,489.40 = 72,815.60/x
  3. Step 3: Cross multiply
    147,756.80x = 221,489.40 × 72,815.60
  4. Step 4: Simplify right side
    147,756.80x = 16,127,883,554.64
  5. Step 5: Solve for x
    x = 16,127,883,554.64/147,756.80
  6. Step 6: Final answer
    x = 109,151.55

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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.