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Finding the Fourth Proportional to 77,125.66, 106,428.21 and 43,589.50

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Solution

The fourth proportional to 77,125.66, 106,428.21 and 43,589.50 is: 60,150.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,125.66 : 106,428.21 = 43,589.50 : x
  2. Step 2: Convert to fraction form
    77,125.66/106,428.21 = 43,589.50/x
  3. Step 3: Cross multiply
    77,125.66x = 106,428.21 × 43,589.50
  4. Step 4: Simplify right side
    77,125.66x = 4,639,152,459.80
  5. Step 5: Solve for x
    x = 4,639,152,459.80/77,125.66
  6. Step 6: Final answer
    x = 60,150.57

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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.