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Finding the Fourth Proportional to 64,897.80, 97,346.70 and 39,856.65

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Solution

The fourth proportional to 64,897.80, 97,346.70 and 39,856.65 is: 59,784.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,897.80 : 97,346.70 = 39,856.65 : x
  2. Step 2: Convert to fraction form
    64,897.80/97,346.70 = 39,856.65/x
  3. Step 3: Cross multiply
    64,897.80x = 97,346.70 × 39,856.65
  4. Step 4: Simplify right side
    64,897.80x = 3,879,913,350.56
  5. Step 5: Solve for x
    x = 3,879,913,350.56/64,897.80
  6. Step 6: Final answer
    x = 59,784.98

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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.