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Finding the Fourth Proportional to 77,670.68, 107,184.52 and 43,684.80

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Solution

The fourth proportional to 77,670.68, 107,184.52 and 43,684.80 is: 60,284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,670.68 : 107,184.52 = 43,684.80 : x
  2. Step 2: Convert to fraction form
    77,670.68/107,184.52 = 43,684.80/x
  3. Step 3: Cross multiply
    77,670.68x = 107,184.52 × 43,684.80
  4. Step 4: Simplify right side
    77,670.68x = 4,682,334,319.30
  5. Step 5: Solve for x
    x = 4,682,334,319.30/77,670.68
  6. Step 6: Final answer
    x = 60,284.45

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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.