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Finding the Fourth Proportional to 188,842.40, 260,465.52 and 128,307.20

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Solution

The fourth proportional to 188,842.40, 260,465.52 and 128,307.20 is: 176,970.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,842.40 : 260,465.52 = 128,307.20 : x
  2. Step 2: Convert to fraction form
    188,842.40/260,465.52 = 128,307.20/x
  3. Step 3: Cross multiply
    188,842.40x = 260,465.52 × 128,307.20
  4. Step 4: Simplify right side
    188,842.40x = 33,419,601,567.74
  5. Step 5: Solve for x
    x = 33,419,601,567.74/188,842.40
  6. Step 6: Final answer
    x = 176,970.86

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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.