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Finding the Fourth Proportional to 85,935, 128,897.32 and 51,096.36

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Solution

The fourth proportional to 85,935, 128,897.32 and 51,096.36 is: 76,641.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,935 : 128,897.32 = 51,096.36 : x
  2. Step 2: Convert to fraction form
    85,935/128,897.32 = 51,096.36/x
  3. Step 3: Cross multiply
    85,935x = 128,897.32 × 51,096.36
  4. Step 4: Simplify right side
    85,935x = 6,586,183,865.76
  5. Step 5: Solve for x
    x = 6,586,183,865.76/85,935
  6. Step 6: Final answer
    x = 76,641.46

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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.