Home / 137,042.15-189,117.30-76,612.51

Finding the Fourth Proportional to 137,042.15, 189,117.30 and 76,612.51

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Solution

The fourth proportional to 137,042.15, 189,117.30 and 76,612.51 is: 105,724.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,042.15 : 189,117.30 = 76,612.51 : x
  2. Step 2: Convert to fraction form
    137,042.15/189,117.30 = 76,612.51/x
  3. Step 3: Cross multiply
    137,042.15x = 189,117.30 × 76,612.51
  4. Step 4: Simplify right side
    137,042.15x = 14,488,750,564.63
  5. Step 5: Solve for x
    x = 14,488,750,564.63/137,042.15
  6. Step 6: Final answer
    x = 105,724.77

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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.