Home / 85,639.76-128,137.08-59,395.28

Finding the Fourth Proportional to 85,639.76, 128,137.08 and 59,395.28

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Solution

The fourth proportional to 85,639.76, 128,137.08 and 59,395.28 is: 88,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,639.76 : 128,137.08 = 59,395.28 : x
  2. Step 2: Convert to fraction form
    85,639.76/128,137.08 = 59,395.28/x
  3. Step 3: Cross multiply
    85,639.76x = 128,137.08 × 59,395.28
  4. Step 4: Simplify right side
    85,639.76x = 7,610,737,744.98
  5. Step 5: Solve for x
    x = 7,610,737,744.98/85,639.76
  6. Step 6: Final answer
    x = 88,869.21

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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.