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Finding the Fourth Proportional to 65,406.70, 90,261.44 and 37,112.32

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Solution

The fourth proportional to 65,406.70, 90,261.44 and 37,112.32 is: 51,215.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,406.70 : 90,261.44 = 37,112.32 : x
  2. Step 2: Convert to fraction form
    65,406.70/90,261.44 = 37,112.32/x
  3. Step 3: Cross multiply
    65,406.70x = 90,261.44 × 37,112.32
  4. Step 4: Simplify right side
    65,406.70x = 3,349,811,444.94
  5. Step 5: Solve for x
    x = 3,349,811,444.94/65,406.70
  6. Step 6: Final answer
    x = 51,215.11

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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.