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Finding the Fourth Proportional to 85,826.88, 128,740.32 and 70,014.87

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Solution

The fourth proportional to 85,826.88, 128,740.32 and 70,014.87 is: 105,022.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826.88 : 128,740.32 = 70,014.87 : x
  2. Step 2: Convert to fraction form
    85,826.88/128,740.32 = 70,014.87/x
  3. Step 3: Cross multiply
    85,826.88x = 128,740.32 × 70,014.87
  4. Step 4: Simplify right side
    85,826.88x = 9,013,736,768.56
  5. Step 5: Solve for x
    x = 9,013,736,768.56/85,826.88
  6. Step 6: Final answer
    x = 105,022.31

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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.