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Finding the Fourth Proportional to 78,470.96, 108,246.12 and 48,235.28

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Solution

The fourth proportional to 78,470.96, 108,246.12 and 48,235.28 is: 66,537.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,470.96 : 108,246.12 = 48,235.28 : x
  2. Step 2: Convert to fraction form
    78,470.96/108,246.12 = 48,235.28/x
  3. Step 3: Cross multiply
    78,470.96x = 108,246.12 × 48,235.28
  4. Step 4: Simplify right side
    78,470.96x = 5,221,281,907.11
  5. Step 5: Solve for x
    x = 5,221,281,907.11/78,470.96
  6. Step 6: Final answer
    x = 66,537.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.