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Finding the Fourth Proportional to 101,344.05, 139,894.22 and 90,715.23

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Solution

The fourth proportional to 101,344.05, 139,894.22 and 90,715.23 is: 125,222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,344.05 : 139,894.22 = 90,715.23 : x
  2. Step 2: Convert to fraction form
    101,344.05/139,894.22 = 90,715.23/x
  3. Step 3: Cross multiply
    101,344.05x = 139,894.22 × 90,715.23
  4. Step 4: Simplify right side
    101,344.05x = 12,690,536,569.76
  5. Step 5: Solve for x
    x = 12,690,536,569.76/101,344.05
  6. Step 6: Final answer
    x = 125,222.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.