Home / 121,020.32-181,555.10-42,140.70

Finding the Fourth Proportional to 121,020.32, 181,555.10 and 42,140.70

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Solution

The fourth proportional to 121,020.32, 181,555.10 and 42,140.70 is: 63,219.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,020.32 : 181,555.10 = 42,140.70 : x
  2. Step 2: Convert to fraction form
    121,020.32/181,555.10 = 42,140.70/x
  3. Step 3: Cross multiply
    121,020.32x = 181,555.10 × 42,140.70
  4. Step 4: Simplify right side
    121,020.32x = 7,650,859,002.57
  5. Step 5: Solve for x
    x = 7,650,859,002.57/121,020.32
  6. Step 6: Final answer
    x = 63,219.62

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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.