Home / 78,708.12-118,080.64-31,326.08

Finding the Fourth Proportional to 78,708.12, 118,080.64 and 31,326.08

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Solution

The fourth proportional to 78,708.12, 118,080.64 and 31,326.08 is: 46,996.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.12 : 118,080.64 = 31,326.08 : x
  2. Step 2: Convert to fraction form
    78,708.12/118,080.64 = 31,326.08/x
  3. Step 3: Cross multiply
    78,708.12x = 118,080.64 × 31,326.08
  4. Step 4: Simplify right side
    78,708.12x = 3,699,003,719.40
  5. Step 5: Solve for x
    x = 3,699,003,719.40/78,708.12
  6. Step 6: Final answer
    x = 46,996.47

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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.