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Finding the Fourth Proportional to 70,487.64, 97,272.90 and 38,656.98

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Solution

The fourth proportional to 70,487.64, 97,272.90 and 38,656.98 is: 53,346.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,487.64 : 97,272.90 = 38,656.98 : x
  2. Step 2: Convert to fraction form
    70,487.64/97,272.90 = 38,656.98/x
  3. Step 3: Cross multiply
    70,487.64x = 97,272.90 × 38,656.98
  4. Step 4: Simplify right side
    70,487.64x = 3,760,276,549.84
  5. Step 5: Solve for x
    x = 3,760,276,549.84/70,487.64
  6. Step 6: Final answer
    x = 53,346.61

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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.