Home / 100,792.12-139,094.18-57,770.68

Finding the Fourth Proportional to 100,792.12, 139,094.18 and 57,770.68

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Solution

The fourth proportional to 100,792.12, 139,094.18 and 57,770.68 is: 79,724.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,792.12 : 139,094.18 = 57,770.68 : x
  2. Step 2: Convert to fraction form
    100,792.12/139,094.18 = 57,770.68/x
  3. Step 3: Cross multiply
    100,792.12x = 139,094.18 × 57,770.68
  4. Step 4: Simplify right side
    100,792.12x = 8,035,565,362.64
  5. Step 5: Solve for x
    x = 8,035,565,362.64/100,792.12
  6. Step 6: Final answer
    x = 79,724.14

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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.