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Finding the Fourth Proportional to 257,551.61, 355,422.18 and 142,840.85

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Solution

The fourth proportional to 257,551.61, 355,422.18 and 142,840.85 is: 197,120.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,551.61 : 355,422.18 = 142,840.85 : x
  2. Step 2: Convert to fraction form
    257,551.61/355,422.18 = 142,840.85/x
  3. Step 3: Cross multiply
    257,551.61x = 355,422.18 × 142,840.85
  4. Step 4: Simplify right side
    257,551.61x = 50,768,806,235.09
  5. Step 5: Solve for x
    x = 50,768,806,235.09/257,551.61
  6. Step 6: Final answer
    x = 197,120.91

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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.