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Finding the Fourth Proportional to 70,949.36, 106,420.95 and 17,640.23

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Solution

The fourth proportional to 70,949.36, 106,420.95 and 17,640.23 is: 26,459.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,949.36 : 106,420.95 = 17,640.23 : x
  2. Step 2: Convert to fraction form
    70,949.36/106,420.95 = 17,640.23/x
  3. Step 3: Cross multiply
    70,949.36x = 106,420.95 × 17,640.23
  4. Step 4: Simplify right side
    70,949.36x = 1,877,289,502.71
  5. Step 5: Solve for x
    x = 1,877,289,502.71/70,949.36
  6. Step 6: Final answer
    x = 26,459.57

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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.