Home / 135,030.19-186,357.51-81,342.31

Finding the Fourth Proportional to 135,030.19, 186,357.51 and 81,342.31

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Solution

The fourth proportional to 135,030.19, 186,357.51 and 81,342.31 is: 112,261.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,030.19 : 186,357.51 = 81,342.31 : x
  2. Step 2: Convert to fraction form
    135,030.19/186,357.51 = 81,342.31/x
  3. Step 3: Cross multiply
    135,030.19x = 186,357.51 × 81,342.31
  4. Step 4: Simplify right side
    135,030.19x = 15,158,750,349.25
  5. Step 5: Solve for x
    x = 15,158,750,349.25/135,030.19
  6. Step 6: Final answer
    x = 112,261.93

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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.