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Finding the Fourth Proportional to 42,710.58, 64,079.58 and 20,525.58

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Solution

The fourth proportional to 42,710.58, 64,079.58 and 20,525.58 is: 30,794.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,710.58 : 64,079.58 = 20,525.58 : x
  2. Step 2: Convert to fraction form
    42,710.58/64,079.58 = 20,525.58/x
  3. Step 3: Cross multiply
    42,710.58x = 64,079.58 × 20,525.58
  4. Step 4: Simplify right side
    42,710.58x = 1,315,270,545.66
  5. Step 5: Solve for x
    x = 1,315,270,545.66/42,710.58
  6. Step 6: Final answer
    x = 30,794.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.