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Finding the Fourth Proportional to 115,635.40, 159,518.40 and 77,396.55

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Solution

The fourth proportional to 115,635.40, 159,518.40 and 77,396.55 is: 106,768.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,635.40 : 159,518.40 = 77,396.55 : x
  2. Step 2: Convert to fraction form
    115,635.40/159,518.40 = 77,396.55/x
  3. Step 3: Cross multiply
    115,635.40x = 159,518.40 × 77,396.55
  4. Step 4: Simplify right side
    115,635.40x = 12,346,172,933.09
  5. Step 5: Solve for x
    x = 12,346,172,933.09/115,635.40
  6. Step 6: Final answer
    x = 106,768.11

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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.