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Finding the Fourth Proportional to 145,860.50, 201,287.67 and 78,792.50

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Solution

The fourth proportional to 145,860.50, 201,287.67 and 78,792.50 is: 108,733.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,860.50 : 201,287.67 = 78,792.50 : x
  2. Step 2: Convert to fraction form
    145,860.50/201,287.67 = 78,792.50/x
  3. Step 3: Cross multiply
    145,860.50x = 201,287.67 × 78,792.50
  4. Step 4: Simplify right side
    145,860.50x = 15,859,958,738.48
  5. Step 5: Solve for x
    x = 15,859,958,738.48/145,860.50
  6. Step 6: Final answer
    x = 108,733.75

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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.