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Finding the Fourth Proportional to 73,138.60, 109,632.30 and 39,788.20

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Solution

The fourth proportional to 73,138.60, 109,632.30 and 39,788.20 is: 59,641.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,138.60 : 109,632.30 = 39,788.20 : x
  2. Step 2: Convert to fraction form
    73,138.60/109,632.30 = 39,788.20/x
  3. Step 3: Cross multiply
    73,138.60x = 109,632.30 × 39,788.20
  4. Step 4: Simplify right side
    73,138.60x = 4,362,071,878.86
  5. Step 5: Solve for x
    x = 4,362,071,878.86/73,138.60
  6. Step 6: Final answer
    x = 59,641.17

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1.5x scale

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.