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Finding the Fourth Proportional to 138,395.58, 207,593.34 and 99,029.58

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Solution

The fourth proportional to 138,395.58, 207,593.34 and 99,029.58 is: 148,544.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,395.58 : 207,593.34 = 99,029.58 : x
  2. Step 2: Convert to fraction form
    138,395.58/207,593.34 = 99,029.58/x
  3. Step 3: Cross multiply
    138,395.58x = 207,593.34 × 99,029.58
  4. Step 4: Simplify right side
    138,395.58x = 20,557,881,271.00
  5. Step 5: Solve for x
    x = 20,557,881,271.00/138,395.58
  6. Step 6: Final answer
    x = 148,544.35

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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.