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Finding the Fourth Proportional to 128,085.52, 176,759.72 and 74,374.80

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Solution

The fourth proportional to 128,085.52, 176,759.72 and 74,374.80 is: 102,638.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.52 : 176,759.72 = 74,374.80 : x
  2. Step 2: Convert to fraction form
    128,085.52/176,759.72 = 74,374.80/x
  3. Step 3: Cross multiply
    128,085.52x = 176,759.72 × 74,374.80
  4. Step 4: Simplify right side
    128,085.52x = 13,146,468,823.06
  5. Step 5: Solve for x
    x = 13,146,468,823.06/128,085.52
  6. Step 6: Final answer
    x = 102,638.21

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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.