Home / 136,962.96-189,027.65-78,818.49

Finding the Fourth Proportional to 136,962.96, 189,027.65 and 78,818.49

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Solution

The fourth proportional to 136,962.96, 189,027.65 and 78,818.49 is: 108,780.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,962.96 : 189,027.65 = 78,818.49 : x
  2. Step 2: Convert to fraction form
    136,962.96/189,027.65 = 78,818.49/x
  3. Step 3: Cross multiply
    136,962.96x = 189,027.65 × 78,818.49
  4. Step 4: Simplify right side
    136,962.96x = 14,898,873,547.16
  5. Step 5: Solve for x
    x = 14,898,873,547.16/136,962.96
  6. Step 6: Final answer
    x = 108,780.31

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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.