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Finding the Fourth Proportional to 77,950.55, 107,571.44 and 42,140.55

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Solution

The fourth proportional to 77,950.55, 107,571.44 and 42,140.55 is: 58,153.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,950.55 : 107,571.44 = 42,140.55 : x
  2. Step 2: Convert to fraction form
    77,950.55/107,571.44 = 42,140.55/x
  3. Step 3: Cross multiply
    77,950.55x = 107,571.44 × 42,140.55
  4. Step 4: Simplify right side
    77,950.55x = 4,533,120,154.64
  5. Step 5: Solve for x
    x = 4,533,120,154.64/77,950.55
  6. Step 6: Final answer
    x = 58,153.79

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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.