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Finding the Fourth Proportional to 155,980.86, 215,253.59 and 84,360.89

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Solution

The fourth proportional to 155,980.86, 215,253.59 and 84,360.89 is: 116,418.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,980.86 : 215,253.59 = 84,360.89 : x
  2. Step 2: Convert to fraction form
    155,980.86/215,253.59 = 84,360.89/x
  3. Step 3: Cross multiply
    155,980.86x = 215,253.59 × 84,360.89
  4. Step 4: Simplify right side
    155,980.86x = 18,158,982,930.02
  5. Step 5: Solve for x
    x = 18,158,982,930.02/155,980.86
  6. Step 6: Final answer
    x = 116,418.02

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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.