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Finding the Fourth Proportional to 85,909.50, 128,732.70 and 35,962.38

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Solution

The fourth proportional to 85,909.50, 128,732.70 and 35,962.38 is: 53,888.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.50 : 128,732.70 = 35,962.38 : x
  2. Step 2: Convert to fraction form
    85,909.50/128,732.70 = 35,962.38/x
  3. Step 3: Cross multiply
    85,909.50x = 128,732.70 × 35,962.38
  4. Step 4: Simplify right side
    85,909.50x = 4,629,534,275.83
  5. Step 5: Solve for x
    x = 4,629,534,275.83/85,909.50
  6. Step 6: Final answer
    x = 53,888.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.