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Finding the Fourth Proportional to 65,590.17, 90,521.40 and 40,111.44

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Solution

The fourth proportional to 65,590.17, 90,521.40 and 40,111.44 is: 55,358.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,590.17 : 90,521.40 = 40,111.44 : x
  2. Step 2: Convert to fraction form
    65,590.17/90,521.40 = 40,111.44/x
  3. Step 3: Cross multiply
    65,590.17x = 90,521.40 × 40,111.44
  4. Step 4: Simplify right side
    65,590.17x = 3,630,943,704.82
  5. Step 5: Solve for x
    x = 3,630,943,704.82/65,590.17
  6. Step 6: Final answer
    x = 55,358.05

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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.