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Finding the Fourth Proportional to 147,909.40, 221,712.90 and 72,914.20

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Solution

The fourth proportional to 147,909.40, 221,712.90 and 72,914.20 is: 109,296.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,909.40 : 221,712.90 = 72,914.20 : x
  2. Step 2: Convert to fraction form
    147,909.40/221,712.90 = 72,914.20/x
  3. Step 3: Cross multiply
    147,909.40x = 221,712.90 × 72,914.20
  4. Step 4: Simplify right side
    147,909.40x = 16,166,018,733.18
  5. Step 5: Solve for x
    x = 16,166,018,733.18/147,909.40
  6. Step 6: Final answer
    x = 109,296.76

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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.