Home / 121,309.42-181,981.14-42,405.70

Finding the Fourth Proportional to 121,309.42, 181,981.14 and 42,405.70

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Solution

The fourth proportional to 121,309.42, 181,981.14 and 42,405.70 is: 63,614.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,309.42 : 181,981.14 = 42,405.70 : x
  2. Step 2: Convert to fraction form
    121,309.42/181,981.14 = 42,405.70/x
  3. Step 3: Cross multiply
    121,309.42x = 181,981.14 × 42,405.70
  4. Step 4: Simplify right side
    121,309.42x = 7,717,037,628.50
  5. Step 5: Solve for x
    x = 7,717,037,628.50/121,309.42
  6. Step 6: Final answer
    x = 63,614.50

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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.