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Finding the Fourth Proportional to 70,610.64, 105,915.90 and 18,020.12

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Solution

The fourth proportional to 70,610.64, 105,915.90 and 18,020.12 is: 27,030.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,610.64 : 105,915.90 = 18,020.12 : x
  2. Step 2: Convert to fraction form
    70,610.64/105,915.90 = 18,020.12/x
  3. Step 3: Cross multiply
    70,610.64x = 105,915.90 × 18,020.12
  4. Step 4: Simplify right side
    70,610.64x = 1,908,617,227.91
  5. Step 5: Solve for x
    x = 1,908,617,227.91/70,610.64
  6. Step 6: Final answer
    x = 27,030.16

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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.