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Finding the Fourth Proportional to 190,719, 286,129.53 and 66,060

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Solution

The fourth proportional to 190,719, 286,129.53 and 66,060 is: 99,107.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,719 : 286,129.53 = 66,060 : x
  2. Step 2: Convert to fraction form
    190,719/286,129.53 = 66,060/x
  3. Step 3: Cross multiply
    190,719x = 286,129.53 × 66,060
  4. Step 4: Simplify right side
    190,719x = 18,901,716,751.80
  5. Step 5: Solve for x
    x = 18,901,716,751.80/190,719
  6. Step 6: Final answer
    x = 99,107.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.