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Finding the Fourth Proportional to 72,480.10, 108,720.15 and 31,008.10

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Solution

The fourth proportional to 72,480.10, 108,720.15 and 31,008.10 is: 46,512.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,480.10 : 108,720.15 = 31,008.10 : x
  2. Step 2: Convert to fraction form
    72,480.10/108,720.15 = 31,008.10/x
  3. Step 3: Cross multiply
    72,480.10x = 108,720.15 × 31,008.10
  4. Step 4: Simplify right side
    72,480.10x = 3,371,205,283.22
  5. Step 5: Solve for x
    x = 3,371,205,283.22/72,480.10
  6. Step 6: Final answer
    x = 46,512.15

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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.