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Finding the Fourth Proportional to 70,488.48, 105,699.24 and 40,915.38

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Solution

The fourth proportional to 70,488.48, 105,699.24 and 40,915.38 is: 61,353.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,488.48 : 105,699.24 = 40,915.38 : x
  2. Step 2: Convert to fraction form
    70,488.48/105,699.24 = 40,915.38/x
  3. Step 3: Cross multiply
    70,488.48x = 105,699.24 × 40,915.38
  4. Step 4: Simplify right side
    70,488.48x = 4,324,724,570.31
  5. Step 5: Solve for x
    x = 4,324,724,570.31/70,488.48
  6. Step 6: Final answer
    x = 61,353.64

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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.