Home / 78,190.41-107,902.95-42,380.38

Finding the Fourth Proportional to 78,190.41, 107,902.95 and 42,380.38

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Solution

The fourth proportional to 78,190.41, 107,902.95 and 42,380.38 is: 58,485.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.41 : 107,902.95 = 42,380.38 : x
  2. Step 2: Convert to fraction form
    78,190.41/107,902.95 = 42,380.38/x
  3. Step 3: Cross multiply
    78,190.41x = 107,902.95 × 42,380.38
  4. Step 4: Simplify right side
    78,190.41x = 4,572,968,024.12
  5. Step 5: Solve for x
    x = 4,572,968,024.12/78,190.41
  6. Step 6: Final answer
    x = 58,485.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.