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Finding the Fourth Proportional to 105,810.40, 158,456.40 and 70,559.20

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Solution

The fourth proportional to 105,810.40, 158,456.40 and 70,559.20 is: 105,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,810.40 : 158,456.40 = 70,559.20 : x
  2. Step 2: Convert to fraction form
    105,810.40/158,456.40 = 70,559.20/x
  3. Step 3: Cross multiply
    105,810.40x = 158,456.40 × 70,559.20
  4. Step 4: Simplify right side
    105,810.40x = 11,180,556,818.88
  5. Step 5: Solve for x
    x = 11,180,556,818.88/105,810.40
  6. Step 6: Final answer
    x = 105,665.95

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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.