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Finding the Fourth Proportional to 74,905.30, 112,406.55 and 43,315.30

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Solution

The fourth proportional to 74,905.30, 112,406.55 and 43,315.30 is: 65,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,905.30 : 112,406.55 = 43,315.30 : x
  2. Step 2: Convert to fraction form
    74,905.30/112,406.55 = 43,315.30/x
  3. Step 3: Cross multiply
    74,905.30x = 112,406.55 × 43,315.30
  4. Step 4: Simplify right side
    74,905.30x = 4,868,923,435.22
  5. Step 5: Solve for x
    x = 4,868,923,435.22/74,905.30
  6. Step 6: Final answer
    x = 65,001.05

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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.