Home / 156,665.48-216,199.64-86,815.95

Finding the Fourth Proportional to 156,665.48, 216,199.64 and 86,815.95

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Solution

The fourth proportional to 156,665.48, 216,199.64 and 86,815.95 is: 119,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,665.48 : 216,199.64 = 86,815.95 : x
  2. Step 2: Convert to fraction form
    156,665.48/216,199.64 = 86,815.95/x
  3. Step 3: Cross multiply
    156,665.48x = 216,199.64 × 86,815.95
  4. Step 4: Simplify right side
    156,665.48x = 18,769,575,621.18
  5. Step 5: Solve for x
    x = 18,769,575,621.18/156,665.48
  6. Step 6: Final answer
    x = 119,806.71

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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.