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Finding the Fourth Proportional to 77,399.52, 106,812.54 and 43,415.55

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Solution

The fourth proportional to 77,399.52, 106,812.54 and 43,415.55 is: 59,914.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,399.52 : 106,812.54 = 43,415.55 : x
  2. Step 2: Convert to fraction form
    77,399.52/106,812.54 = 43,415.55/x
  3. Step 3: Cross multiply
    77,399.52x = 106,812.54 × 43,415.55
  4. Step 4: Simplify right side
    77,399.52x = 4,637,325,171.00
  5. Step 5: Solve for x
    x = 4,637,325,171.00/77,399.52
  6. Step 6: Final answer
    x = 59,914.13

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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.