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Finding the Fourth Proportional to 128,482.32, 177,293.13 and 74,774.46

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Solution

The fourth proportional to 128,482.32, 177,293.13 and 74,774.46 is: 103,181.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482.32 : 177,293.13 = 74,774.46 : x
  2. Step 2: Convert to fraction form
    128,482.32/177,293.13 = 74,774.46/x
  3. Step 3: Cross multiply
    128,482.32x = 177,293.13 × 74,774.46
  4. Step 4: Simplify right side
    128,482.32x = 13,256,998,057.46
  5. Step 5: Solve for x
    x = 13,256,998,057.46/128,482.32
  6. Step 6: Final answer
    x = 103,181.50

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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.