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Finding the Fourth Proportional to 115,387.84, 159,243.21 and 64,410.48

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Solution

The fourth proportional to 115,387.84, 159,243.21 and 64,410.48 is: 88,890.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,387.84 : 159,243.21 = 64,410.48 : x
  2. Step 2: Convert to fraction form
    115,387.84/159,243.21 = 64,410.48/x
  3. Step 3: Cross multiply
    115,387.84x = 159,243.21 × 64,410.48
  4. Step 4: Simplify right side
    115,387.84x = 10,256,931,859.56
  5. Step 5: Solve for x
    x = 10,256,931,859.56/115,387.84
  6. Step 6: Final answer
    x = 88,890.92

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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.