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Finding the Fourth Proportional to 108,032.80, 161,903.40 and 72,392.80

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Solution

The fourth proportional to 108,032.80, 161,903.40 and 72,392.80 is: 108,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,032.80 : 161,903.40 = 72,392.80 : x
  2. Step 2: Convert to fraction form
    108,032.80/161,903.40 = 72,392.80/x
  3. Step 3: Cross multiply
    108,032.80x = 161,903.40 × 72,392.80
  4. Step 4: Simplify right side
    108,032.80x = 11,720,640,455.52
  5. Step 5: Solve for x
    x = 11,720,640,455.52/108,032.80
  6. Step 6: Final answer
    x = 108,491.50

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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.