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Finding the Fourth Proportional to 124,564.68, 171,846.90 and 86,860.80

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Solution

The fourth proportional to 124,564.68, 171,846.90 and 86,860.80 is: 119,831.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,564.68 : 171,846.90 = 86,860.80 : x
  2. Step 2: Convert to fraction form
    124,564.68/171,846.90 = 86,860.80/x
  3. Step 3: Cross multiply
    124,564.68x = 171,846.90 × 86,860.80
  4. Step 4: Simplify right side
    124,564.68x = 14,926,759,211.52
  5. Step 5: Solve for x
    x = 14,926,759,211.52/124,564.68
  6. Step 6: Final answer
    x = 119,831.39

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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.