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Finding the Fourth Proportional to 70,330.13, 105,495.21 and 21,082.13

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Solution

The fourth proportional to 70,330.13, 105,495.21 and 21,082.13 is: 31,623.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,330.13 : 105,495.21 = 21,082.13 : x
  2. Step 2: Convert to fraction form
    70,330.13/105,495.21 = 21,082.13/x
  3. Step 3: Cross multiply
    70,330.13x = 105,495.21 × 21,082.13
  4. Step 4: Simplify right side
    70,330.13x = 2,224,063,204.12
  5. Step 5: Solve for x
    x = 2,224,063,204.12/70,330.13
  6. Step 6: Final answer
    x = 31,623.19

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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.