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Finding the Fourth Proportional to 85,754.33, 128,631.54 and 35,807.20

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Solution

The fourth proportional to 85,754.33, 128,631.54 and 35,807.20 is: 53,710.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,754.33 : 128,631.54 = 35,807.20 : x
  2. Step 2: Convert to fraction form
    85,754.33/128,631.54 = 35,807.20/x
  3. Step 3: Cross multiply
    85,754.33x = 128,631.54 × 35,807.20
  4. Step 4: Simplify right side
    85,754.33x = 4,605,935,091.79
  5. Step 5: Solve for x
    x = 4,605,935,091.79/85,754.33
  6. Step 6: Final answer
    x = 53,710.82

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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.