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Finding the Fourth Proportional to 65,660.04, 90,602.01 and 36,978.30

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Solution

The fourth proportional to 65,660.04, 90,602.01 and 36,978.30 is: 51,025.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,660.04 : 90,602.01 = 36,978.30 : x
  2. Step 2: Convert to fraction form
    65,660.04/90,602.01 = 36,978.30/x
  3. Step 3: Cross multiply
    65,660.04x = 90,602.01 × 36,978.30
  4. Step 4: Simplify right side
    65,660.04x = 3,350,308,306.38
  5. Step 5: Solve for x
    x = 3,350,308,306.38/65,660.04
  6. Step 6: Final answer
    x = 51,025.07

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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.