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Finding the Fourth Proportional to 91,594.86, 138,121.08 and 90,345.84

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Solution

The fourth proportional to 91,594.86, 138,121.08 and 90,345.84 is: 136,237.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,594.86 : 138,121.08 = 90,345.84 : x
  2. Step 2: Convert to fraction form
    91,594.86/138,121.08 = 90,345.84/x
  3. Step 3: Cross multiply
    91,594.86x = 138,121.08 × 90,345.84
  4. Step 4: Simplify right side
    91,594.86x = 12,478,664,994.31
  5. Step 5: Solve for x
    x = 12,478,664,994.31/91,594.86
  6. Step 6: Final answer
    x = 136,237.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.