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Finding the Fourth Proportional to 118,220.40, 162,999 and 73,430.64

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Solution

The fourth proportional to 118,220.40, 162,999 and 73,430.64 is: 101,244.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,220.40 : 162,999 = 73,430.64 : x
  2. Step 2: Convert to fraction form
    118,220.40/162,999 = 73,430.64/x
  3. Step 3: Cross multiply
    118,220.40x = 162,999 × 73,430.64
  4. Step 4: Simplify right side
    118,220.40x = 11,969,120,889.36
  5. Step 5: Solve for x
    x = 11,969,120,889.36/118,220.40
  6. Step 6: Final answer
    x = 101,244.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.