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Finding the Fourth Proportional to 142,705.60, 214,058.40 and 83,510.80

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Solution

The fourth proportional to 142,705.60, 214,058.40 and 83,510.80 is: 125,266.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,705.60 : 214,058.40 = 83,510.80 : x
  2. Step 2: Convert to fraction form
    142,705.60/214,058.40 = 83,510.80/x
  3. Step 3: Cross multiply
    142,705.60x = 214,058.40 × 83,510.80
  4. Step 4: Simplify right side
    142,705.60x = 17,876,188,230.72
  5. Step 5: Solve for x
    x = 17,876,188,230.72/142,705.60
  6. Step 6: Final answer
    x = 125,266.20

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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.