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Finding the Fourth Proportional to 100,590.31, 138,816.93 and 55,271.11

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Solution

The fourth proportional to 100,590.31, 138,816.93 and 55,271.11 is: 76,275.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,590.31 : 138,816.93 = 55,271.11 : x
  2. Step 2: Convert to fraction form
    100,590.31/138,816.93 = 55,271.11/x
  3. Step 3: Cross multiply
    100,590.31x = 138,816.93 × 55,271.11
  4. Step 4: Simplify right side
    100,590.31x = 7,672,565,807.89
  5. Step 5: Solve for x
    x = 7,672,565,807.89/100,590.31
  6. Step 6: Final answer
    x = 76,275.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.