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Finding the Fourth Proportional to 77,143.71, 106,453.30 and 43,146.30

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Solution

The fourth proportional to 77,143.71, 106,453.30 and 43,146.30 is: 59,539.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,143.71 : 106,453.30 = 43,146.30 : x
  2. Step 2: Convert to fraction form
    77,143.71/106,453.30 = 43,146.30/x
  3. Step 3: Cross multiply
    77,143.71x = 106,453.30 × 43,146.30
  4. Step 4: Simplify right side
    77,143.71x = 4,593,066,017.79
  5. Step 5: Solve for x
    x = 4,593,066,017.79/77,143.71
  6. Step 6: Final answer
    x = 59,539.09

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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.