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Finding the Fourth Proportional to 258,215.67, 387,164.95 and 89,663.58

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Solution

The fourth proportional to 258,215.67, 387,164.95 and 89,663.58 is: 134,440.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,215.67 : 387,164.95 = 89,663.58 : x
  2. Step 2: Convert to fraction form
    258,215.67/387,164.95 = 89,663.58/x
  3. Step 3: Cross multiply
    258,215.67x = 387,164.95 × 89,663.58
  4. Step 4: Simplify right side
    258,215.67x = 34,714,595,243.36
  5. Step 5: Solve for x
    x = 34,714,595,243.36/258,215.67
  6. Step 6: Final answer
    x = 134,440.31

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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.