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Finding the Fourth Proportional to 70,215.70, 96,897.70 and 38,384.60

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Solution

The fourth proportional to 70,215.70, 96,897.70 and 38,384.60 is: 52,970.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,215.70 : 96,897.70 = 38,384.60 : x
  2. Step 2: Convert to fraction form
    70,215.70/96,897.70 = 38,384.60/x
  3. Step 3: Cross multiply
    70,215.70x = 96,897.70 × 38,384.60
  4. Step 4: Simplify right side
    70,215.70x = 3,719,379,455.42
  5. Step 5: Solve for x
    x = 3,719,379,455.42/70,215.70
  6. Step 6: Final answer
    x = 52,970.77

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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.