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Finding the Fourth Proportional to 142,900.60, 214,205.10 and 83,705.80

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Solution

The fourth proportional to 142,900.60, 214,205.10 and 83,705.80 is: 125,473.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,900.60 : 214,205.10 = 83,705.80 : x
  2. Step 2: Convert to fraction form
    142,900.60/214,205.10 = 83,705.80/x
  3. Step 3: Cross multiply
    142,900.60x = 214,205.10 × 83,705.80
  4. Step 4: Simplify right side
    142,900.60x = 17,930,209,259.58
  5. Step 5: Solve for x
    x = 17,930,209,259.58/142,900.60
  6. Step 6: Final answer
    x = 125,473.30

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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.