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Finding the Fourth Proportional to 142,421.60, 213,664.80 and 83,226.80

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Solution

The fourth proportional to 142,421.60, 213,664.80 and 83,226.80 is: 124,859.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,421.60 : 213,664.80 = 83,226.80 : x
  2. Step 2: Convert to fraction form
    142,421.60/213,664.80 = 83,226.80/x
  3. Step 3: Cross multiply
    142,421.60x = 213,664.80 × 83,226.80
  4. Step 4: Simplify right side
    142,421.60x = 17,782,637,576.64
  5. Step 5: Solve for x
    x = 17,782,637,576.64/142,421.60
  6. Step 6: Final answer
    x = 124,859.13

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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.