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Finding the Fourth Proportional to 121,774.80, 182,969.40 and 77,422.80

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Solution

The fourth proportional to 121,774.80, 182,969.40 and 77,422.80 is: 116,329.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,774.80 : 182,969.40 = 77,422.80 : x
  2. Step 2: Convert to fraction form
    121,774.80/182,969.40 = 77,422.80/x
  3. Step 3: Cross multiply
    121,774.80x = 182,969.40 × 77,422.80
  4. Step 4: Simplify right side
    121,774.80x = 14,166,003,262.32
  5. Step 5: Solve for x
    x = 14,166,003,262.32/121,774.80
  6. Step 6: Final answer
    x = 116,329.51

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1.5x scale

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.