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Finding the Fourth Proportional to 65,678.34, 90,636.68 and 37,385.84

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Solution

The fourth proportional to 65,678.34, 90,636.68 and 37,385.84 is: 51,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,678.34 : 90,636.68 = 37,385.84 : x
  2. Step 2: Convert to fraction form
    65,678.34/90,636.68 = 37,385.84/x
  3. Step 3: Cross multiply
    65,678.34x = 90,636.68 × 37,385.84
  4. Step 4: Simplify right side
    65,678.34x = 3,388,528,416.61
  5. Step 5: Solve for x
    x = 3,388,528,416.61/65,678.34
  6. Step 6: Final answer
    x = 51,592.78

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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.