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Finding the Fourth Proportional to 70,290.90, 105,319.71 and 49,470.66

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Solution

The fourth proportional to 70,290.90, 105,319.71 and 49,470.66 is: 74,123.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,290.90 : 105,319.71 = 49,470.66 : x
  2. Step 2: Convert to fraction form
    70,290.90/105,319.71 = 49,470.66/x
  3. Step 3: Cross multiply
    70,290.90x = 105,319.71 × 49,470.66
  4. Step 4: Simplify right side
    70,290.90x = 5,210,235,317.36
  5. Step 5: Solve for x
    x = 5,210,235,317.36/70,290.90
  6. Step 6: Final answer
    x = 74,123.90

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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.