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Finding the Fourth Proportional to 113,699.20, 170,743.20 and 74,430.40

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Solution

The fourth proportional to 113,699.20, 170,743.20 and 74,430.40 is: 111,772.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,699.20 : 170,743.20 = 74,430.40 : x
  2. Step 2: Convert to fraction form
    113,699.20/170,743.20 = 74,430.40/x
  3. Step 3: Cross multiply
    113,699.20x = 170,743.20 × 74,430.40
  4. Step 4: Simplify right side
    113,699.20x = 12,708,484,673.28
  5. Step 5: Solve for x
    x = 12,708,484,673.28/113,699.20
  6. Step 6: Final answer
    x = 111,772.86

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1.5x scale

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.