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Finding the Fourth Proportional to 117,860.90, 162,647.55 and 64,145.90

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Solution

The fourth proportional to 117,860.90, 162,647.55 and 64,145.90 is: 88,521.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,860.90 : 162,647.55 = 64,145.90 : x
  2. Step 2: Convert to fraction form
    117,860.90/162,647.55 = 64,145.90/x
  3. Step 3: Cross multiply
    117,860.90x = 162,647.55 × 64,145.90
  4. Step 4: Simplify right side
    117,860.90x = 10,433,173,884.16
  5. Step 5: Solve for x
    x = 10,433,173,884.16/117,860.90
  6. Step 6: Final answer
    x = 88,521.08

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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.