Home / 139,140.18-192,012.12-75,478.23

Finding the Fourth Proportional to 139,140.18, 192,012.12 and 75,478.23

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Solution

The fourth proportional to 139,140.18, 192,012.12 and 75,478.23 is: 104,159.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,140.18 : 192,012.12 = 75,478.23 : x
  2. Step 2: Convert to fraction form
    139,140.18/192,012.12 = 75,478.23/x
  3. Step 3: Cross multiply
    139,140.18x = 192,012.12 × 75,478.23
  4. Step 4: Simplify right side
    139,140.18x = 14,492,734,956.15
  5. Step 5: Solve for x
    x = 14,492,734,956.15/139,140.18
  6. Step 6: Final answer
    x = 104,159.24

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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.