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Finding the Fourth Proportional to 85,369.18, 128,020.95 and 58,993.96

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Solution

The fourth proportional to 85,369.18, 128,020.95 and 58,993.96 is: 88,468.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,369.18 : 128,020.95 = 58,993.96 : x
  2. Step 2: Convert to fraction form
    85,369.18/128,020.95 = 58,993.96/x
  3. Step 3: Cross multiply
    85,369.18x = 128,020.95 × 58,993.96
  4. Step 4: Simplify right side
    85,369.18x = 7,552,462,803.46
  5. Step 5: Solve for x
    x = 7,552,462,803.46/85,369.18
  6. Step 6: Final answer
    x = 88,468.26

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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.