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Finding the Fourth Proportional to 121,189.19, 181,866.80 and 42,303.42

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Solution

The fourth proportional to 121,189.19, 181,866.80 and 42,303.42 is: 63,484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,189.19 : 181,866.80 = 42,303.42 : x
  2. Step 2: Convert to fraction form
    121,189.19/181,866.80 = 42,303.42/x
  3. Step 3: Cross multiply
    121,189.19x = 181,866.80 × 42,303.42
  4. Step 4: Simplify right side
    121,189.19x = 7,693,587,730.21
  5. Step 5: Solve for x
    x = 7,693,587,730.21/121,189.19
  6. Step 6: Final answer
    x = 63,484.11

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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.