Home / 78,088.74-117,134.55-28,172.58

Finding the Fourth Proportional to 78,088.74, 117,134.55 and 28,172.58

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Solution

The fourth proportional to 78,088.74, 117,134.55 and 28,172.58 is: 42,259.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,088.74 : 117,134.55 = 28,172.58 : x
  2. Step 2: Convert to fraction form
    78,088.74/117,134.55 = 28,172.58/x
  3. Step 3: Cross multiply
    78,088.74x = 117,134.55 × 28,172.58
  4. Step 4: Simplify right side
    78,088.74x = 3,299,982,480.64
  5. Step 5: Solve for x
    x = 3,299,982,480.64/78,088.74
  6. Step 6: Final answer
    x = 42,259.39

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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.