Home / 78,347.12-117,567.37-28,431.11

Finding the Fourth Proportional to 78,347.12, 117,567.37 and 28,431.11

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Solution

The fourth proportional to 78,347.12, 117,567.37 and 28,431.11 is: 42,663.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.12 : 117,567.37 = 28,431.11 : x
  2. Step 2: Convert to fraction form
    78,347.12/117,567.37 = 28,431.11/x
  3. Step 3: Cross multiply
    78,347.12x = 117,567.37 × 28,431.11
  4. Step 4: Simplify right side
    78,347.12x = 3,342,571,403.63
  5. Step 5: Solve for x
    x = 3,342,571,403.63/78,347.12
  6. Step 6: Final answer
    x = 42,663.61

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1.5x scale

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.