Home / 78,186.12-117,308.70-47,043.24

Finding the Fourth Proportional to 78,186.12, 117,308.70 and 47,043.24

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Solution

The fourth proportional to 78,186.12, 117,308.70 and 47,043.24 is: 70,582.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,186.12 : 117,308.70 = 47,043.24 : x
  2. Step 2: Convert to fraction form
    78,186.12/117,308.70 = 47,043.24/x
  3. Step 3: Cross multiply
    78,186.12x = 117,308.70 × 47,043.24
  4. Step 4: Simplify right side
    78,186.12x = 5,518,581,328.19
  5. Step 5: Solve for x
    x = 5,518,581,328.19/78,186.12
  6. Step 6: Final answer
    x = 70,582.62

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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.