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Finding the Fourth Proportional to 257,253.64, 355,012.72 and 142,535.80

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Solution

The fourth proportional to 257,253.64, 355,012.72 and 142,535.80 is: 196,700.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,253.64 : 355,012.72 = 142,535.80 : x
  2. Step 2: Convert to fraction form
    257,253.64/355,012.72 = 142,535.80/x
  3. Step 3: Cross multiply
    257,253.64x = 355,012.72 × 142,535.80
  4. Step 4: Simplify right side
    257,253.64x = 50,602,022,055.38
  5. Step 5: Solve for x
    x = 50,602,022,055.38/257,253.64
  6. Step 6: Final answer
    x = 196,700.90

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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.