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Finding the Fourth Proportional to 172,408.80, 237,877.65 and 100,806.42

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Solution

The fourth proportional to 172,408.80, 237,877.65 and 100,806.42 is: 139,085.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,408.80 : 237,877.65 = 100,806.42 : x
  2. Step 2: Convert to fraction form
    172,408.80/237,877.65 = 100,806.42/x
  3. Step 3: Cross multiply
    172,408.80x = 237,877.65 × 100,806.42
  4. Step 4: Simplify right side
    172,408.80x = 23,979,594,294.51
  5. Step 5: Solve for x
    x = 23,979,594,294.51/172,408.80
  6. Step 6: Final answer
    x = 139,085.67

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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.