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Finding the Fourth Proportional to 257,587.71, 355,458.36 and 142,857.36

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Solution

The fourth proportional to 257,587.71, 355,458.36 and 142,857.36 is: 197,136.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,587.71 : 355,458.36 = 142,857.36 : x
  2. Step 2: Convert to fraction form
    257,587.71/355,458.36 = 142,857.36/x
  3. Step 3: Cross multiply
    257,587.71x = 355,458.36 × 142,857.36
  4. Step 4: Simplify right side
    257,587.71x = 50,779,842,899.53
  5. Step 5: Solve for x
    x = 50,779,842,899.53/257,587.71
  6. Step 6: Final answer
    x = 197,136.12

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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.