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Finding the Fourth Proportional to 145,671.72, 218,532.54 and 66,792.72

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Solution

The fourth proportional to 145,671.72, 218,532.54 and 66,792.72 is: 100,200.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,671.72 : 218,532.54 = 66,792.72 : x
  2. Step 2: Convert to fraction form
    145,671.72/218,532.54 = 66,792.72/x
  3. Step 3: Cross multiply
    145,671.72x = 218,532.54 × 66,792.72
  4. Step 4: Simplify right side
    145,671.72x = 14,596,382,755.11
  5. Step 5: Solve for x
    x = 14,596,382,755.11/145,671.72
  6. Step 6: Final answer
    x = 100,200.52

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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.