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Finding the Fourth Proportional to 142,859.40, 214,783.20 and 133,609.20

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Solution

The fourth proportional to 142,859.40, 214,783.20 and 133,609.20 is: 200,875.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,859.40 : 214,783.20 = 133,609.20 : x
  2. Step 2: Convert to fraction form
    142,859.40/214,783.20 = 133,609.20/x
  3. Step 3: Cross multiply
    142,859.40x = 214,783.20 × 133,609.20
  4. Step 4: Simplify right side
    142,859.40x = 28,697,011,525.44
  5. Step 5: Solve for x
    x = 28,697,011,525.44/142,859.40
  6. Step 6: Final answer
    x = 200,875.91

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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.