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Finding the Fourth Proportional to 70,085.76, 96,718.32 and 39,870.96

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Solution

The fourth proportional to 70,085.76, 96,718.32 and 39,870.96 is: 55,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,085.76 : 96,718.32 = 39,870.96 : x
  2. Step 2: Convert to fraction form
    70,085.76/96,718.32 = 39,870.96/x
  3. Step 3: Cross multiply
    70,085.76x = 96,718.32 × 39,870.96
  4. Step 4: Simplify right side
    70,085.76x = 3,856,252,267.99
  5. Step 5: Solve for x
    x = 3,856,252,267.99/70,085.76
  6. Step 6: Final answer
    x = 55,021.91

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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.