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Finding the Fourth Proportional to 153,606.68, 211,956.29 and 85,615.58

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Solution

The fourth proportional to 153,606.68, 211,956.29 and 85,615.58 is: 118,137.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,606.68 : 211,956.29 = 85,615.58 : x
  2. Step 2: Convert to fraction form
    153,606.68/211,956.29 = 85,615.58/x
  3. Step 3: Cross multiply
    153,606.68x = 211,956.29 × 85,615.58
  4. Step 4: Simplify right side
    153,606.68x = 18,146,761,607.46
  5. Step 5: Solve for x
    x = 18,146,761,607.46/153,606.68
  6. Step 6: Final answer
    x = 118,137.84

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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.