Home / 105,138.83-157,647.65-71,899.17

Finding the Fourth Proportional to 105,138.83, 157,647.65 and 71,899.17

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Solution

The fourth proportional to 105,138.83, 157,647.65 and 71,899.17 is: 107,807.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,138.83 : 157,647.65 = 71,899.17 : x
  2. Step 2: Convert to fraction form
    105,138.83/157,647.65 = 71,899.17/x
  3. Step 3: Cross multiply
    105,138.83x = 157,647.65 × 71,899.17
  4. Step 4: Simplify right side
    105,138.83x = 11,334,734,236.78
  5. Step 5: Solve for x
    x = 11,334,734,236.78/105,138.83
  6. Step 6: Final answer
    x = 107,807.31

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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.