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Finding the Fourth Proportional to 112,740, 155,586.06 and 62,439

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Solution

The fourth proportional to 112,740, 155,586.06 and 62,439 is: 86,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,740 : 155,586.06 = 62,439 : x
  2. Step 2: Convert to fraction form
    112,740/155,586.06 = 62,439/x
  3. Step 3: Cross multiply
    112,740x = 155,586.06 × 62,439
  4. Step 4: Simplify right side
    112,740x = 9,714,638,000.34
  5. Step 5: Solve for x
    x = 9,714,638,000.34/112,740
  6. Step 6: Final answer
    x = 86,168.51

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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.