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Finding the Fourth Proportional to 64,656.78, 89,205.57 and 39,155.01

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Solution

The fourth proportional to 64,656.78, 89,205.57 and 39,155.01 is: 54,021.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,656.78 : 89,205.57 = 39,155.01 : x
  2. Step 2: Convert to fraction form
    64,656.78/89,205.57 = 39,155.01/x
  3. Step 3: Cross multiply
    64,656.78x = 89,205.57 × 39,155.01
  4. Step 4: Simplify right side
    64,656.78x = 3,492,844,985.41
  5. Step 5: Solve for x
    x = 3,492,844,985.41/64,656.78
  6. Step 6: Final answer
    x = 54,021.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.