Home / 138,630.64-191,330.00-78,206.87

Finding the Fourth Proportional to 138,630.64, 191,330.00 and 78,206.87

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Solution

The fourth proportional to 138,630.64, 191,330.00 and 78,206.87 is: 107,936.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,630.64 : 191,330.00 = 78,206.87 : x
  2. Step 2: Convert to fraction form
    138,630.64/191,330.00 = 78,206.87/x
  3. Step 3: Cross multiply
    138,630.64x = 191,330.00 × 78,206.87
  4. Step 4: Simplify right side
    138,630.64x = 14,963,319,741.44
  5. Step 5: Solve for x
    x = 14,963,319,741.44/138,630.64
  6. Step 6: Final answer
    x = 107,936.60

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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.