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Finding the Fourth Proportional to 77,921.70, 107,518.29 and 46,078.98

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Solution

The fourth proportional to 77,921.70, 107,518.29 and 46,078.98 is: 63,580.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,921.70 : 107,518.29 = 46,078.98 : x
  2. Step 2: Convert to fraction form
    77,921.70/107,518.29 = 46,078.98/x
  3. Step 3: Cross multiply
    77,921.70x = 107,518.29 × 46,078.98
  4. Step 4: Simplify right side
    77,921.70x = 4,954,332,558.55
  5. Step 5: Solve for x
    x = 4,954,332,558.55/77,921.70
  6. Step 6: Final answer
    x = 63,580.91

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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.