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Finding the Fourth Proportional to 100,395.31, 138,544.35 and 57,952.93

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Solution

The fourth proportional to 100,395.31, 138,544.35 and 57,952.93 is: 79,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,395.31 : 138,544.35 = 57,952.93 : x
  2. Step 2: Convert to fraction form
    100,395.31/138,544.35 = 57,952.93/x
  3. Step 3: Cross multiply
    100,395.31x = 138,544.35 × 57,952.93
  4. Step 4: Simplify right side
    100,395.31x = 8,029,051,017.45
  5. Step 5: Solve for x
    x = 8,029,051,017.45/100,395.31
  6. Step 6: Final answer
    x = 79,974.36

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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.