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Finding the Fourth Proportional to 72,985.52, 100,720.50 and 46,140.14

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Solution

The fourth proportional to 72,985.52, 100,720.50 and 46,140.14 is: 63,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.52 : 100,720.50 = 46,140.14 : x
  2. Step 2: Convert to fraction form
    72,985.52/100,720.50 = 46,140.14/x
  3. Step 3: Cross multiply
    72,985.52x = 100,720.50 × 46,140.14
  4. Step 4: Simplify right side
    72,985.52x = 4,647,257,970.87
  5. Step 5: Solve for x
    x = 4,647,257,970.87/72,985.52
  6. Step 6: Final answer
    x = 63,673.70

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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.