Home / 103,539.51-142,531.92-76,631.31

Finding the Fourth Proportional to 103,539.51, 142,531.92 and 76,631.31

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Solution

The fourth proportional to 103,539.51, 142,531.92 and 76,631.31 is: 105,490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,539.51 : 142,531.92 = 76,631.31 : x
  2. Step 2: Convert to fraction form
    103,539.51/142,531.92 = 76,631.31/x
  3. Step 3: Cross multiply
    103,539.51x = 142,531.92 × 76,631.31
  4. Step 4: Simplify right side
    103,539.51x = 10,922,407,746.42
  5. Step 5: Solve for x
    x = 10,922,407,746.42/103,539.51
  6. Step 6: Final answer
    x = 105,490.24

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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.