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Finding the Fourth Proportional to 142,019,978.70, 213,029,968.05 and 103,756,226.70

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Solution

The fourth proportional to 142,019,978.70, 213,029,968.05 and 103,756,226.70 is: 155,634,340.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,019,978.70 : 213,029,968.05 = 103,756,226.70 : x
  2. Step 2: Convert to fraction form
    142,019,978.70/213,029,968.05 = 103,756,226.70/x
  3. Step 3: Cross multiply
    142,019,978.70x = 213,029,968.05 × 103,756,226.70
  4. Step 4: Simplify right side
    142,019,978.70x = 22,103,185,658,889,560
  5. Step 5: Solve for x
    x = 22,103,185,658,889,560/142,019,978.70
  6. Step 6: Final answer
    x = 155,634,340.05

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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.