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Finding the Fourth Proportional to 77,123.60, 115,512.60 and 46,019.60

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Solution

The fourth proportional to 77,123.60, 115,512.60 and 46,019.60 is: 68,926.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,123.60 : 115,512.60 = 46,019.60 : x
  2. Step 2: Convert to fraction form
    77,123.60/115,512.60 = 46,019.60/x
  3. Step 3: Cross multiply
    77,123.60x = 115,512.60 × 46,019.60
  4. Step 4: Simplify right side
    77,123.60x = 5,315,843,646.96
  5. Step 5: Solve for x
    x = 5,315,843,646.96/77,123.60
  6. Step 6: Final answer
    x = 68,926.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.