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Finding the Fourth Proportional to 74,423.20, 111,505.20 and 64,055.20

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Solution

The fourth proportional to 74,423.20, 111,505.20 and 64,055.20 is: 95,971.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,423.20 : 111,505.20 = 64,055.20 : x
  2. Step 2: Convert to fraction form
    74,423.20/111,505.20 = 64,055.20/x
  3. Step 3: Cross multiply
    74,423.20x = 111,505.20 × 64,055.20
  4. Step 4: Simplify right side
    74,423.20x = 7,142,487,887.04
  5. Step 5: Solve for x
    x = 7,142,487,887.04/74,423.20
  6. Step 6: Final answer
    x = 95,971.25

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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.