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Finding the Fourth Proportional to 157,689.12, 236,408 and 91,053.60

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Solution

The fourth proportional to 157,689.12, 236,408 and 91,053.60 is: 136,507.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,689.12 : 236,408 = 91,053.60 : x
  2. Step 2: Convert to fraction form
    157,689.12/236,408 = 91,053.60/x
  3. Step 3: Cross multiply
    157,689.12x = 236,408 × 91,053.60
  4. Step 4: Simplify right side
    157,689.12x = 21,525,799,468.80
  5. Step 5: Solve for x
    x = 21,525,799,468.80/157,689.12
  6. Step 6: Final answer
    x = 136,507.83

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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.