Home / 190,665.80-285,828.74-72,420.17

Finding the Fourth Proportional to 190,665.80, 285,828.74 and 72,420.17

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Solution

The fourth proportional to 190,665.80, 285,828.74 and 72,420.17 is: 108,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,665.80 : 285,828.74 = 72,420.17 : x
  2. Step 2: Convert to fraction form
    190,665.80/285,828.74 = 72,420.17/x
  3. Step 3: Cross multiply
    190,665.80x = 285,828.74 × 72,420.17
  4. Step 4: Simplify right side
    190,665.80x = 20,699,766,294.16
  5. Step 5: Solve for x
    x = 20,699,766,294.16/190,665.80
  6. Step 6: Final answer
    x = 108,565.70

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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.