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Finding the Fourth Proportional to 70,329.17, 105,493.76 and 21,081.17

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Solution

The fourth proportional to 70,329.17, 105,493.76 and 21,081.17 is: 31,621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,329.17 : 105,493.76 = 21,081.17 : x
  2. Step 2: Convert to fraction form
    70,329.17/105,493.76 = 21,081.17/x
  3. Step 3: Cross multiply
    70,329.17x = 105,493.76 × 21,081.17
  4. Step 4: Simplify right side
    70,329.17x = 2,223,931,888.50
  5. Step 5: Solve for x
    x = 2,223,931,888.50/70,329.17
  6. Step 6: Final answer
    x = 31,621.76

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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.