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Finding the Fourth Proportional to 155,393.55, 214,382.37 and 87,394.93

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Solution

The fourth proportional to 155,393.55, 214,382.37 and 87,394.93 is: 120,570.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,393.55 : 214,382.37 = 87,394.93 : x
  2. Step 2: Convert to fraction form
    155,393.55/214,382.37 = 87,394.93/x
  3. Step 3: Cross multiply
    155,393.55x = 214,382.37 × 87,394.93
  4. Step 4: Simplify right side
    155,393.55x = 18,735,932,219.38
  5. Step 5: Solve for x
    x = 18,735,932,219.38/155,393.55
  6. Step 6: Final answer
    x = 120,570.85

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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.