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Finding the Fourth Proportional to 357,051.48, 535,574.91 and 90,809.70

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Solution

The fourth proportional to 357,051.48, 535,574.91 and 90,809.70 is: 136,213.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,051.48 : 535,574.91 = 90,809.70 : x
  2. Step 2: Convert to fraction form
    357,051.48/535,574.91 = 90,809.70/x
  3. Step 3: Cross multiply
    357,051.48x = 535,574.91 × 90,809.70
  4. Step 4: Simplify right side
    357,051.48x = 48,635,396,904.63
  5. Step 5: Solve for x
    x = 48,635,396,904.63/357,051.48
  6. Step 6: Final answer
    x = 136,213.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.