Home / 156,741.89-216,300.38-85,121.28

Finding the Fourth Proportional to 156,741.89, 216,300.38 and 85,121.28

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Solution

The fourth proportional to 156,741.89, 216,300.38 and 85,121.28 is: 117,465.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,741.89 : 216,300.38 = 85,121.28 : x
  2. Step 2: Convert to fraction form
    156,741.89/216,300.38 = 85,121.28/x
  3. Step 3: Cross multiply
    156,741.89x = 216,300.38 × 85,121.28
  4. Step 4: Simplify right side
    156,741.89x = 18,411,764,784.48
  5. Step 5: Solve for x
    x = 18,411,764,784.48/156,741.89
  6. Step 6: Final answer
    x = 117,465.51

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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.