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Finding the Fourth Proportional to 86,041.32, 128,893.95 and 56,369.04

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Solution

The fourth proportional to 86,041.32, 128,893.95 and 56,369.04 is: 84,443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,041.32 : 128,893.95 = 56,369.04 : x
  2. Step 2: Convert to fraction form
    86,041.32/128,893.95 = 56,369.04/x
  3. Step 3: Cross multiply
    86,041.32x = 128,893.95 × 56,369.04
  4. Step 4: Simplify right side
    86,041.32x = 7,265,628,223.31
  5. Step 5: Solve for x
    x = 7,265,628,223.31/86,041.32
  6. Step 6: Final answer
    x = 84,443.48

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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.