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Finding the Fourth Proportional to 115,718.70, 159,621.97 and 76,427.92

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Solution

The fourth proportional to 115,718.70, 159,621.97 and 76,427.92 is: 105,424.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,718.70 : 159,621.97 = 76,427.92 : x
  2. Step 2: Convert to fraction form
    115,718.70/159,621.97 = 76,427.92/x
  3. Step 3: Cross multiply
    115,718.70x = 159,621.97 × 76,427.92
  4. Step 4: Simplify right side
    115,718.70x = 12,199,575,153.40
  5. Step 5: Solve for x
    x = 12,199,575,153.40/115,718.70
  6. Step 6: Final answer
    x = 105,424.41

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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.