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Finding the Fourth Proportional to 121,031.80, 181,547.70 and 119,087.80

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Solution

The fourth proportional to 121,031.80, 181,547.70 and 119,087.80 is: 178,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,031.80 : 181,547.70 = 119,087.80 : x
  2. Step 2: Convert to fraction form
    121,031.80/181,547.70 = 119,087.80/x
  3. Step 3: Cross multiply
    121,031.80x = 181,547.70 × 119,087.80
  4. Step 4: Simplify right side
    121,031.80x = 21,620,116,188.06
  5. Step 5: Solve for x
    x = 21,620,116,188.06/121,031.80
  6. Step 6: Final answer
    x = 178,631.70

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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.