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Finding the Fourth Proportional to 147,900.90, 221,700.15 and 72,905.70

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Solution

The fourth proportional to 147,900.90, 221,700.15 and 72,905.70 is: 109,284.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,900.90 : 221,700.15 = 72,905.70 : x
  2. Step 2: Convert to fraction form
    147,900.90/221,700.15 = 72,905.70/x
  3. Step 3: Cross multiply
    147,900.90x = 221,700.15 × 72,905.70
  4. Step 4: Simplify right side
    147,900.90x = 16,163,204,625.86
  5. Step 5: Solve for x
    x = 16,163,204,625.86/147,900.90
  6. Step 6: Final answer
    x = 109,284.02

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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.