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Finding the Fourth Proportional to 85,888.54, 128,836.85 and 70,867.79

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Solution

The fourth proportional to 85,888.54, 128,836.85 and 70,867.79 is: 106,305.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,888.54 : 128,836.85 = 70,867.79 : x
  2. Step 2: Convert to fraction form
    85,888.54/128,836.85 = 70,867.79/x
  3. Step 3: Cross multiply
    85,888.54x = 128,836.85 × 70,867.79
  4. Step 4: Simplify right side
    85,888.54x = 9,130,382,475.72
  5. Step 5: Solve for x
    x = 9,130,382,475.72/85,888.54
  6. Step 6: Final answer
    x = 106,305.02

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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.