Home / 135,803.57-187,417.88-78,445.31

Finding the Fourth Proportional to 135,803.57, 187,417.88 and 78,445.31

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Solution

The fourth proportional to 135,803.57, 187,417.88 and 78,445.31 is: 108,259.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,803.57 : 187,417.88 = 78,445.31 : x
  2. Step 2: Convert to fraction form
    135,803.57/187,417.88 = 78,445.31/x
  3. Step 3: Cross multiply
    135,803.57x = 187,417.88 × 78,445.31
  4. Step 4: Simplify right side
    135,803.57x = 14,702,053,494.59
  5. Step 5: Solve for x
    x = 14,702,053,494.59/135,803.57
  6. Step 6: Final answer
    x = 108,259.69

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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.