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Finding the Fourth Proportional to 128,966.58, 193,451.29 and 39,010.21

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Solution

The fourth proportional to 128,966.58, 193,451.29 and 39,010.21 is: 58,515.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,966.58 : 193,451.29 = 39,010.21 : x
  2. Step 2: Convert to fraction form
    128,966.58/193,451.29 = 39,010.21/x
  3. Step 3: Cross multiply
    128,966.58x = 193,451.29 × 39,010.21
  4. Step 4: Simplify right side
    128,966.58x = 7,546,574,866.52
  5. Step 5: Solve for x
    x = 7,546,574,866.52/128,966.58
  6. Step 6: Final answer
    x = 58,515.74

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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.