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Finding the Fourth Proportional to 65,510.36, 90,407.50 and 36,839.05

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Solution

The fourth proportional to 65,510.36, 90,407.50 and 36,839.05 is: 50,839.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,510.36 : 90,407.50 = 36,839.05 : x
  2. Step 2: Convert to fraction form
    65,510.36/90,407.50 = 36,839.05/x
  3. Step 3: Cross multiply
    65,510.36x = 90,407.50 × 36,839.05
  4. Step 4: Simplify right side
    65,510.36x = 3,330,525,960.84
  5. Step 5: Solve for x
    x = 3,330,525,960.84/65,510.36
  6. Step 6: Final answer
    x = 50,839.68

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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.