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Finding the Fourth Proportional to 121,212.40, 181,753.80 and 51,012.40

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Solution

The fourth proportional to 121,212.40, 181,753.80 and 51,012.40 is: 76,491.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,212.40 : 181,753.80 = 51,012.40 : x
  2. Step 2: Convert to fraction form
    121,212.40/181,753.80 = 51,012.40/x
  3. Step 3: Cross multiply
    121,212.40x = 181,753.80 × 51,012.40
  4. Step 4: Simplify right side
    121,212.40x = 9,271,697,547.12
  5. Step 5: Solve for x
    x = 9,271,697,547.12/121,212.40
  6. Step 6: Final answer
    x = 76,491.33

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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.