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Finding the Fourth Proportional to 74,752.20, 112,128.30 and 66,004.20

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Solution

The fourth proportional to 74,752.20, 112,128.30 and 66,004.20 is: 99,006.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,752.20 : 112,128.30 = 66,004.20 : x
  2. Step 2: Convert to fraction form
    74,752.20/112,128.30 = 66,004.20/x
  3. Step 3: Cross multiply
    74,752.20x = 112,128.30 × 66,004.20
  4. Step 4: Simplify right side
    74,752.20x = 7,400,938,738.86
  5. Step 5: Solve for x
    x = 7,400,938,738.86/74,752.20
  6. Step 6: Final answer
    x = 99,006.30

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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.