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Finding the Fourth Proportional to 139,478.95, 192,501.99 and 85,062.69

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Solution

The fourth proportional to 139,478.95, 192,501.99 and 85,062.69 is: 117,399.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,478.95 : 192,501.99 = 85,062.69 : x
  2. Step 2: Convert to fraction form
    139,478.95/192,501.99 = 85,062.69/x
  3. Step 3: Cross multiply
    139,478.95x = 192,501.99 × 85,062.69
  4. Step 4: Simplify right side
    139,478.95x = 16,374,737,099.75
  5. Step 5: Solve for x
    x = 16,374,737,099.75/139,478.95
  6. Step 6: Final answer
    x = 117,399.35

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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.