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Finding the Fourth Proportional to 77,391.51, 106,801.50 and 43,407.55

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Solution

The fourth proportional to 77,391.51, 106,801.50 and 43,407.55 is: 59,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,391.51 : 106,801.50 = 43,407.55 : x
  2. Step 2: Convert to fraction form
    77,391.51/106,801.50 = 43,407.55/x
  3. Step 3: Cross multiply
    77,391.51x = 106,801.50 × 43,407.55
  4. Step 4: Simplify right side
    77,391.51x = 4,635,991,451.33
  5. Step 5: Solve for x
    x = 4,635,991,451.33/77,391.51
  6. Step 6: Final answer
    x = 59,903.10

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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.