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Finding the Fourth Proportional to 70,807.80, 97,714.79 and 38,976.47

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Solution

The fourth proportional to 70,807.80, 97,714.79 and 38,976.47 is: 53,787.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,807.80 : 97,714.79 = 38,976.47 : x
  2. Step 2: Convert to fraction form
    70,807.80/97,714.79 = 38,976.47/x
  3. Step 3: Cross multiply
    70,807.80x = 97,714.79 × 38,976.47
  4. Step 4: Simplify right side
    70,807.80x = 3,808,576,897.54
  5. Step 5: Solve for x
    x = 3,808,576,897.54/70,807.80
  6. Step 6: Final answer
    x = 53,787.53

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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.