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Finding the Fourth Proportional to 115,378.80, 159,216.10 and 64,387.53

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Solution

The fourth proportional to 115,378.80, 159,216.10 and 64,387.53 is: 88,851.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,378.80 : 159,216.10 = 64,387.53 : x
  2. Step 2: Convert to fraction form
    115,378.80/159,216.10 = 64,387.53/x
  3. Step 3: Cross multiply
    115,378.80x = 159,216.10 × 64,387.53
  4. Step 4: Simplify right side
    115,378.80x = 10,251,531,415.23
  5. Step 5: Solve for x
    x = 10,251,531,415.23/115,378.80
  6. Step 6: Final answer
    x = 88,851.08

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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.