Home / 113,130.20-169,695.30-71,139.80

Finding the Fourth Proportional to 113,130.20, 169,695.30 and 71,139.80

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Solution

The fourth proportional to 113,130.20, 169,695.30 and 71,139.80 is: 106,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,130.20 : 169,695.30 = 71,139.80 : x
  2. Step 2: Convert to fraction form
    113,130.20/169,695.30 = 71,139.80/x
  3. Step 3: Cross multiply
    113,130.20x = 169,695.30 × 71,139.80
  4. Step 4: Simplify right side
    113,130.20x = 12,072,089,702.94
  5. Step 5: Solve for x
    x = 12,072,089,702.94/113,130.20
  6. Step 6: Final answer
    x = 106,709.70

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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.