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Finding the Fourth Proportional to 65,681.86, 90,628.70 and 36,999.36

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Solution

The fourth proportional to 65,681.86, 90,628.70 and 36,999.36 is: 51,052.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,681.86 : 90,628.70 = 36,999.36 : x
  2. Step 2: Convert to fraction form
    65,681.86/90,628.70 = 36,999.36/x
  3. Step 3: Cross multiply
    65,681.86x = 90,628.70 × 36,999.36
  4. Step 4: Simplify right side
    65,681.86x = 3,353,203,897.63
  5. Step 5: Solve for x
    x = 3,353,203,897.63/65,681.86
  6. Step 6: Final answer
    x = 51,052.21

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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.