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Finding the Fourth Proportional to 121,141, 181,712.30 and 42,254.92

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Solution

The fourth proportional to 121,141, 181,712.30 and 42,254.92 is: 63,382.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,141 : 181,712.30 = 42,254.92 : x
  2. Step 2: Convert to fraction form
    121,141/181,712.30 = 42,254.92/x
  3. Step 3: Cross multiply
    121,141x = 181,712.30 × 42,254.92
  4. Step 4: Simplify right side
    121,141x = 7,678,238,699.52
  5. Step 5: Solve for x
    x = 7,678,238,699.52/121,141
  6. Step 6: Final answer
    x = 63,382.66

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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.