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Finding the Fourth Proportional to 144,745.20, 217,312.20 and 92,386.80

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Solution

The fourth proportional to 144,745.20, 217,312.20 and 92,386.80 is: 138,704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,745.20 : 217,312.20 = 92,386.80 : x
  2. Step 2: Convert to fraction form
    144,745.20/217,312.20 = 92,386.80/x
  3. Step 3: Cross multiply
    144,745.20x = 217,312.20 × 92,386.80
  4. Step 4: Simplify right side
    144,745.20x = 20,076,778,758.96
  5. Step 5: Solve for x
    x = 20,076,778,758.96/144,745.20
  6. Step 6: Final answer
    x = 138,704.28

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1.5x scale

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.