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Finding the Fourth Proportional to 89,670.60, 123,756.34 and 53,879.40

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Solution

The fourth proportional to 89,670.60, 123,756.34 and 53,879.40 is: 74,360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,670.60 : 123,756.34 = 53,879.40 : x
  2. Step 2: Convert to fraction form
    89,670.60/123,756.34 = 53,879.40/x
  3. Step 3: Cross multiply
    89,670.60x = 123,756.34 × 53,879.40
  4. Step 4: Simplify right side
    89,670.60x = 6,667,917,345.40
  5. Step 5: Solve for x
    x = 6,667,917,345.40/89,670.60
  6. Step 6: Final answer
    x = 74,360.13

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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.