Home / 156,989.48-216,646.50-85,370.28

Finding the Fourth Proportional to 156,989.48, 216,646.50 and 85,370.28

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Solution

The fourth proportional to 156,989.48, 216,646.50 and 85,370.28 is: 117,811.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.48 : 216,646.50 = 85,370.28 : x
  2. Step 2: Convert to fraction form
    156,989.48/216,646.50 = 85,370.28/x
  3. Step 3: Cross multiply
    156,989.48x = 216,646.50 × 85,370.28
  4. Step 4: Simplify right side
    156,989.48x = 18,495,172,366.02
  5. Step 5: Solve for x
    x = 18,495,172,366.02/156,989.48
  6. Step 6: Final answer
    x = 117,811.54

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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.