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Finding the Fourth Proportional to 121,898.69, 182,920.70 and 54,425.49

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Solution

The fourth proportional to 121,898.69, 182,920.70 and 54,425.49 is: 81,670.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,898.69 : 182,920.70 = 54,425.49 : x
  2. Step 2: Convert to fraction form
    121,898.69/182,920.70 = 54,425.49/x
  3. Step 3: Cross multiply
    121,898.69x = 182,920.70 × 54,425.49
  4. Step 4: Simplify right side
    121,898.69x = 9,955,547,541.91
  5. Step 5: Solve for x
    x = 9,955,547,541.91/121,898.69
  6. Step 6: Final answer
    x = 81,670.67

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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.