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Finding the Fourth Proportional to 147,904.40, 221,705.40 and 72,909.20

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Solution

The fourth proportional to 147,904.40, 221,705.40 and 72,909.20 is: 109,289.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,904.40 : 221,705.40 = 72,909.20 : x
  2. Step 2: Convert to fraction form
    147,904.40/221,705.40 = 72,909.20/x
  3. Step 3: Cross multiply
    147,904.40x = 221,705.40 × 72,909.20
  4. Step 4: Simplify right side
    147,904.40x = 16,164,363,349.68
  5. Step 5: Solve for x
    x = 16,164,363,349.68/147,904.40
  6. Step 6: Final answer
    x = 109,289.27

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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.