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Finding the Fourth Proportional to 77,312.98, 115,970.55 and 21,908.98

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Solution

The fourth proportional to 77,312.98, 115,970.55 and 21,908.98 is: 32,863.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,312.98 : 115,970.55 = 21,908.98 : x
  2. Step 2: Convert to fraction form
    77,312.98/115,970.55 = 21,908.98/x
  3. Step 3: Cross multiply
    77,312.98x = 115,970.55 × 21,908.98
  4. Step 4: Simplify right side
    77,312.98x = 2,540,796,460.54
  5. Step 5: Solve for x
    x = 2,540,796,460.54/77,312.98
  6. Step 6: Final answer
    x = 32,863.78

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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.