Home / 90,740.10-136,092.39-86,239.32

Finding the Fourth Proportional to 90,740.10, 136,092.39 and 86,239.32

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Solution

The fourth proportional to 90,740.10, 136,092.39 and 86,239.32 is: 129,342.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,740.10 : 136,092.39 = 86,239.32 : x
  2. Step 2: Convert to fraction form
    90,740.10/136,092.39 = 86,239.32/x
  3. Step 3: Cross multiply
    90,740.10x = 136,092.39 × 86,239.32
  4. Step 4: Simplify right side
    90,740.10x = 11,736,515,170.77
  5. Step 5: Solve for x
    x = 11,736,515,170.77/90,740.10
  6. Step 6: Final answer
    x = 129,342.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.