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Finding the Fourth Proportional to 258,641.12, 387,532.56 and 90,072.32

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Solution

The fourth proportional to 258,641.12, 387,532.56 and 90,072.32 is: 134,959.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,641.12 : 387,532.56 = 90,072.32 : x
  2. Step 2: Convert to fraction form
    258,641.12/387,532.56 = 90,072.32/x
  3. Step 3: Cross multiply
    258,641.12x = 387,532.56 × 90,072.32
  4. Step 4: Simplify right side
    258,641.12x = 34,905,956,754.74
  5. Step 5: Solve for x
    x = 34,905,956,754.74/258,641.12
  6. Step 6: Final answer
    x = 134,959.04

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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.