Home / 78,357.15-117,455.30-30,953.05

Finding the Fourth Proportional to 78,357.15, 117,455.30 and 30,953.05

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Solution

The fourth proportional to 78,357.15, 117,455.30 and 30,953.05 is: 46,397.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,357.15 : 117,455.30 = 30,953.05 : x
  2. Step 2: Convert to fraction form
    78,357.15/117,455.30 = 30,953.05/x
  3. Step 3: Cross multiply
    78,357.15x = 117,455.30 × 30,953.05
  4. Step 4: Simplify right side
    78,357.15x = 3,635,599,441.34
  5. Step 5: Solve for x
    x = 3,635,599,441.34/78,357.15
  6. Step 6: Final answer
    x = 46,397.80

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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.