Home / 139,972.32-193,164.48-76,312.80

Finding the Fourth Proportional to 139,972.32, 193,164.48 and 76,312.80

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Solution

The fourth proportional to 139,972.32, 193,164.48 and 76,312.80 is: 105,313.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,972.32 : 193,164.48 = 76,312.80 : x
  2. Step 2: Convert to fraction form
    139,972.32/193,164.48 = 76,312.80/x
  3. Step 3: Cross multiply
    139,972.32x = 193,164.48 × 76,312.80
  4. Step 4: Simplify right side
    139,972.32x = 14,740,922,329.34
  5. Step 5: Solve for x
    x = 14,740,922,329.34/139,972.32
  6. Step 6: Final answer
    x = 105,313.12

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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.