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Finding the Fourth Proportional to 85,599.72, 128,216.70 and 69,516.77

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Solution

The fourth proportional to 85,599.72, 128,216.70 and 69,516.77 is: 104,126.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,599.72 : 128,216.70 = 69,516.77 : x
  2. Step 2: Convert to fraction form
    85,599.72/128,216.70 = 69,516.77/x
  3. Step 3: Cross multiply
    85,599.72x = 128,216.70 × 69,516.77
  4. Step 4: Simplify right side
    85,599.72x = 8,913,210,202.98
  5. Step 5: Solve for x
    x = 8,913,210,202.98/85,599.72
  6. Step 6: Final answer
    x = 104,126.63

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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.