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Finding the Fourth Proportional to 64,102.26, 87,990.29 and 56,870.58

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Solution

The fourth proportional to 64,102.26, 87,990.29 and 56,870.58 is: 78,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,102.26 : 87,990.29 = 56,870.58 : x
  2. Step 2: Convert to fraction form
    64,102.26/87,990.29 = 56,870.58/x
  3. Step 3: Cross multiply
    64,102.26x = 87,990.29 × 56,870.58
  4. Step 4: Simplify right side
    64,102.26x = 5,004,058,542.32
  5. Step 5: Solve for x
    x = 5,004,058,542.32/64,102.26
  6. Step 6: Final answer
    x = 78,063.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.