Home / 121,140.32-181,711.22-42,254.64

Finding the Fourth Proportional to 121,140.32, 181,711.22 and 42,254.64

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Solution

The fourth proportional to 121,140.32, 181,711.22 and 42,254.64 is: 63,382.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,140.32 : 181,711.22 = 42,254.64 : x
  2. Step 2: Convert to fraction form
    121,140.32/181,711.22 = 42,254.64/x
  3. Step 3: Cross multiply
    121,140.32x = 181,711.22 × 42,254.64
  4. Step 4: Simplify right side
    121,140.32x = 7,678,141,973.79
  5. Step 5: Solve for x
    x = 7,678,141,973.79/121,140.32
  6. Step 6: Final answer
    x = 63,382.22

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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.