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Finding the Fourth Proportional to 121,495.85, 167,663.74 and 67,780.91

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Solution

The fourth proportional to 121,495.85, 167,663.74 and 67,780.91 is: 93,537.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,495.85 : 167,663.74 = 67,780.91 : x
  2. Step 2: Convert to fraction form
    121,495.85/167,663.74 = 67,780.91/x
  3. Step 3: Cross multiply
    121,495.85x = 167,663.74 × 67,780.91
  4. Step 4: Simplify right side
    121,495.85x = 11,364,400,871.20
  5. Step 5: Solve for x
    x = 11,364,400,871.20/121,495.85
  6. Step 6: Final answer
    x = 93,537.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.