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Finding the Fourth Proportional to 315,866.64, 473,659.18 and 91,173.66

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Solution

The fourth proportional to 315,866.64, 473,659.18 and 91,173.66 is: 136,719.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,866.64 : 473,659.18 = 91,173.66 : x
  2. Step 2: Convert to fraction form
    315,866.64/473,659.18 = 91,173.66/x
  3. Step 3: Cross multiply
    315,866.64x = 473,659.18 × 91,173.66
  4. Step 4: Simplify right side
    315,866.64x = 43,185,239,029.04
  5. Step 5: Solve for x
    x = 43,185,239,029.04/315,866.64
  6. Step 6: Final answer
    x = 136,719.85

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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.