Home / 156,971.90-216,615.30-85,349.45

Finding the Fourth Proportional to 156,971.90, 216,615.30 and 85,349.45

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Solution

The fourth proportional to 156,971.90, 216,615.30 and 85,349.45 is: 117,779.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,971.90 : 216,615.30 = 85,349.45 : x
  2. Step 2: Convert to fraction form
    156,971.90/216,615.30 = 85,349.45/x
  3. Step 3: Cross multiply
    156,971.90x = 216,615.30 × 85,349.45
  4. Step 4: Simplify right side
    156,971.90x = 18,487,996,716.59
  5. Step 5: Solve for x
    x = 18,487,996,716.59/156,971.90
  6. Step 6: Final answer
    x = 117,779.02

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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.