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Finding the Fourth Proportional to 153,330.80, 211,587 and 89,664.80

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Solution

The fourth proportional to 153,330.80, 211,587 and 89,664.80 is: 123,731.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,330.80 : 211,587 = 89,664.80 : x
  2. Step 2: Convert to fraction form
    153,330.80/211,587 = 89,664.80/x
  3. Step 3: Cross multiply
    153,330.80x = 211,587 × 89,664.80
  4. Step 4: Simplify right side
    153,330.80x = 18,971,906,037.60
  5. Step 5: Solve for x
    x = 18,971,906,037.60/153,330.80
  6. Step 6: Final answer
    x = 123,731.87

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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.