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Finding the Fourth Proportional to 64,891.80, 97,337.70 and 15,643.80

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Solution

The fourth proportional to 64,891.80, 97,337.70 and 15,643.80 is: 23,465.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,891.80 : 97,337.70 = 15,643.80 : x
  2. Step 2: Convert to fraction form
    64,891.80/97,337.70 = 15,643.80/x
  3. Step 3: Cross multiply
    64,891.80x = 97,337.70 × 15,643.80
  4. Step 4: Simplify right side
    64,891.80x = 1,522,731,511.26
  5. Step 5: Solve for x
    x = 1,522,731,511.26/64,891.80
  6. Step 6: Final answer
    x = 23,465.70

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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.