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Finding the Fourth Proportional to 70,905.67, 97,848.57 and 38,640.57

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Solution

The fourth proportional to 70,905.67, 97,848.57 and 38,640.57 is: 53,323.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,905.67 : 97,848.57 = 38,640.57 : x
  2. Step 2: Convert to fraction form
    70,905.67/97,848.57 = 38,640.57/x
  3. Step 3: Cross multiply
    70,905.67x = 97,848.57 × 38,640.57
  4. Step 4: Simplify right side
    70,905.67x = 3,780,924,518.48
  5. Step 5: Solve for x
    x = 3,780,924,518.48/70,905.67
  6. Step 6: Final answer
    x = 53,323.30

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1.5x scale

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.