Home / 78,500.04-117,750.09-19,336.86

Finding the Fourth Proportional to 78,500.04, 117,750.09 and 19,336.86

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Solution

The fourth proportional to 78,500.04, 117,750.09 and 19,336.86 is: 29,005.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500.04 : 117,750.09 = 19,336.86 : x
  2. Step 2: Convert to fraction form
    78,500.04/117,750.09 = 19,336.86/x
  3. Step 3: Cross multiply
    78,500.04x = 117,750.09 × 19,336.86
  4. Step 4: Simplify right side
    78,500.04x = 2,276,917,005.32
  5. Step 5: Solve for x
    x = 2,276,917,005.32/78,500.04
  6. Step 6: Final answer
    x = 29,005.30

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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.