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Finding the Fourth Proportional to 73,210.40, 109,815.60 and 48,278.60

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Solution

The fourth proportional to 73,210.40, 109,815.60 and 48,278.60 is: 72,417.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,210.40 : 109,815.60 = 48,278.60 : x
  2. Step 2: Convert to fraction form
    73,210.40/109,815.60 = 48,278.60/x
  3. Step 3: Cross multiply
    73,210.40x = 109,815.60 × 48,278.60
  4. Step 4: Simplify right side
    73,210.40x = 5,301,743,426.16
  5. Step 5: Solve for x
    x = 5,301,743,426.16/73,210.40
  6. Step 6: Final answer
    x = 72,417.90

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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.