Home / 142,019,969.80-213,029,954.70-81,553,793.80

Finding the Fourth Proportional to 142,019,969.80, 213,029,954.70 and 81,553,793.80

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Solution

The fourth proportional to 142,019,969.80, 213,029,954.70 and 81,553,793.80 is: 122,330,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,019,969.80 : 213,029,954.70 = 81,553,793.80 : x
  2. Step 2: Convert to fraction form
    142,019,969.80/213,029,954.70 = 81,553,793.80/x
  3. Step 3: Cross multiply
    142,019,969.80x = 213,029,954.70 × 81,553,793.80
  4. Step 4: Simplify right side
    142,019,969.80x = 17,373,400,998,827,140
  5. Step 5: Solve for x
    x = 17,373,400,998,827,140/142,019,969.80
  6. Step 6: Final answer
    x = 122,330,690.70

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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.