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Finding the Fourth Proportional to 70,491.60, 105,823.80 and 69,973.20

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Solution

The fourth proportional to 70,491.60, 105,823.80 and 69,973.20 is: 105,045.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,491.60 : 105,823.80 = 69,973.20 : x
  2. Step 2: Convert to fraction form
    70,491.60/105,823.80 = 69,973.20/x
  3. Step 3: Cross multiply
    70,491.60x = 105,823.80 × 69,973.20
  4. Step 4: Simplify right side
    70,491.60x = 7,404,829,922.16
  5. Step 5: Solve for x
    x = 7,404,829,922.16/70,491.60
  6. Step 6: Final answer
    x = 105,045.56

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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.