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Finding the Fourth Proportional to 64,008.90, 96,031.90 and 19,642.20

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Solution

The fourth proportional to 64,008.90, 96,031.90 and 19,642.20 is: 29,468.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,008.90 : 96,031.90 = 19,642.20 : x
  2. Step 2: Convert to fraction form
    64,008.90/96,031.90 = 19,642.20/x
  3. Step 3: Cross multiply
    64,008.90x = 96,031.90 × 19,642.20
  4. Step 4: Simplify right side
    64,008.90x = 1,886,277,786.18
  5. Step 5: Solve for x
    x = 1,886,277,786.18/64,008.90
  6. Step 6: Final answer
    x = 29,468.99

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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.