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Finding the Fourth Proportional to 235,712.34, 325,276.80 and 128,280.09

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Solution

The fourth proportional to 235,712.34, 325,276.80 and 128,280.09 is: 177,023.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,712.34 : 325,276.80 = 128,280.09 : x
  2. Step 2: Convert to fraction form
    235,712.34/325,276.80 = 128,280.09/x
  3. Step 3: Cross multiply
    235,712.34x = 325,276.80 × 128,280.09
  4. Step 4: Simplify right side
    235,712.34x = 41,726,537,178.91
  5. Step 5: Solve for x
    x = 41,726,537,178.91/235,712.34
  6. Step 6: Final answer
    x = 177,023.13

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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.