Home / 139,092,093.20-208,638,139.80-81,611,901.20

Finding the Fourth Proportional to 139,092,093.20, 208,638,139.80 and 81,611,901.20

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Solution

The fourth proportional to 139,092,093.20, 208,638,139.80 and 81,611,901.20 is: 122,417,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,092,093.20 : 208,638,139.80 = 81,611,901.20 : x
  2. Step 2: Convert to fraction form
    139,092,093.20/208,638,139.80 = 81,611,901.20/x
  3. Step 3: Cross multiply
    139,092,093.20x = 208,638,139.80 × 81,611,901.20
  4. Step 4: Simplify right side
    139,092,093.20x = 17,027,355,251,909,390
  5. Step 5: Solve for x
    x = 17,027,355,251,909,390/139,092,093.20
  6. Step 6: Final answer
    x = 122,417,851.80

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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.