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Finding the Fourth Proportional to 157,681.40, 236,586.90 and 57,889.40

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Solution

The fourth proportional to 157,681.40, 236,586.90 and 57,889.40 is: 86,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,681.40 : 236,586.90 = 57,889.40 : x
  2. Step 2: Convert to fraction form
    157,681.40/236,586.90 = 57,889.40/x
  3. Step 3: Cross multiply
    157,681.40x = 236,586.90 × 57,889.40
  4. Step 4: Simplify right side
    157,681.40x = 13,695,873,688.86
  5. Step 5: Solve for x
    x = 13,695,873,688.86/157,681.40
  6. Step 6: Final answer
    x = 86,857.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.