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Finding the Fourth Proportional to 142,803.40, 214,205.10 and 54,059.80

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Solution

The fourth proportional to 142,803.40, 214,205.10 and 54,059.80 is: 81,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,803.40 : 214,205.10 = 54,059.80 : x
  2. Step 2: Convert to fraction form
    142,803.40/214,205.10 = 54,059.80/x
  3. Step 3: Cross multiply
    142,803.40x = 214,205.10 × 54,059.80
  4. Step 4: Simplify right side
    142,803.40x = 11,579,884,864.98
  5. Step 5: Solve for x
    x = 11,579,884,864.98/142,803.40
  6. Step 6: Final answer
    x = 81,089.70

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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.