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Finding the Fourth Proportional to 121,354.28, 181,913.80 and 46,416.72

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Solution

The fourth proportional to 121,354.28, 181,913.80 and 46,416.72 is: 69,580.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,354.28 : 181,913.80 = 46,416.72 : x
  2. Step 2: Convert to fraction form
    121,354.28/181,913.80 = 46,416.72/x
  3. Step 3: Cross multiply
    121,354.28x = 181,913.80 × 46,416.72
  4. Step 4: Simplify right side
    121,354.28x = 8,443,841,918.74
  5. Step 5: Solve for x
    x = 8,443,841,918.74/121,354.28
  6. Step 6: Final answer
    x = 69,580.09

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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.