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Finding the Fourth Proportional to 76,590.60, 105,620.79 and 51,098.01

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Solution

The fourth proportional to 76,590.60, 105,620.79 and 51,098.01 is: 70,465.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,590.60 : 105,620.79 = 51,098.01 : x
  2. Step 2: Convert to fraction form
    76,590.60/105,620.79 = 51,098.01/x
  3. Step 3: Cross multiply
    76,590.60x = 105,620.79 × 51,098.01
  4. Step 4: Simplify right side
    76,590.60x = 5,397,011,979.17
  5. Step 5: Solve for x
    x = 5,397,011,979.17/76,590.60
  6. Step 6: Final answer
    x = 70,465.73

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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.