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Finding the Fourth Proportional to 59,762.40, 89,638.20 and 20,320.80

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Solution

The fourth proportional to 59,762.40, 89,638.20 and 20,320.80 is: 30,479.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,762.40 : 89,638.20 = 20,320.80 : x
  2. Step 2: Convert to fraction form
    59,762.40/89,638.20 = 20,320.80/x
  3. Step 3: Cross multiply
    59,762.40x = 89,638.20 × 20,320.80
  4. Step 4: Simplify right side
    59,762.40x = 1,821,519,934.56
  5. Step 5: Solve for x
    x = 1,821,519,934.56/59,762.40
  6. Step 6: Final answer
    x = 30,479.36

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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.