Home / 121,338.40-181,942.80-42,455.20

Finding the Fourth Proportional to 121,338.40, 181,942.80 and 42,455.20

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Solution

The fourth proportional to 121,338.40, 181,942.80 and 42,455.20 is: 63,660.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,338.40 : 181,942.80 = 42,455.20 : x
  2. Step 2: Convert to fraction form
    121,338.40/181,942.80 = 42,455.20/x
  3. Step 3: Cross multiply
    121,338.40x = 181,942.80 × 42,455.20
  4. Step 4: Simplify right side
    121,338.40x = 7,724,417,962.56
  5. Step 5: Solve for x
    x = 7,724,417,962.56/121,338.40
  6. Step 6: Final answer
    x = 63,660.13

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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.