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Finding the Fourth Proportional to 156,879.56, 216,495.47 and 85,259.58

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Solution

The fourth proportional to 156,879.56, 216,495.47 and 85,259.58 is: 117,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,879.56 : 216,495.47 = 85,259.58 : x
  2. Step 2: Convert to fraction form
    156,879.56/216,495.47 = 85,259.58/x
  3. Step 3: Cross multiply
    156,879.56x = 216,495.47 × 85,259.58
  4. Step 4: Simplify right side
    156,879.56x = 18,458,312,417.80
  5. Step 5: Solve for x
    x = 18,458,312,417.80/156,879.56
  6. Step 6: Final answer
    x = 117,659.13

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1.5x scale

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.