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Finding the Fourth Proportional to 70,330.38, 105,495.59 and 21,082.38

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Solution

The fourth proportional to 70,330.38, 105,495.59 and 21,082.38 is: 31,623.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,330.38 : 105,495.59 = 21,082.38 : x
  2. Step 2: Convert to fraction form
    70,330.38/105,495.59 = 21,082.38/x
  3. Step 3: Cross multiply
    70,330.38x = 105,495.59 × 21,082.38
  4. Step 4: Simplify right side
    70,330.38x = 2,224,097,483.81
  5. Step 5: Solve for x
    x = 2,224,097,483.81/70,330.38
  6. Step 6: Final answer
    x = 31,623.57

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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.