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Finding the Fourth Proportional to 139,818,356.78, 209,788,014.36 and 75,046,493.84

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Solution

The fourth proportional to 139,818,356.78, 209,788,014.36 and 75,046,493.84 is: 112,602,202.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,818,356.78 : 209,788,014.36 = 75,046,493.84 : x
  2. Step 2: Convert to fraction form
    139,818,356.78/209,788,014.36 = 75,046,493.84/x
  3. Step 3: Cross multiply
    139,818,356.78x = 209,788,014.36 × 75,046,493.84
  4. Step 4: Simplify right side
    139,818,356.78x = 15,743,854,927,373,574
  5. Step 5: Solve for x
    x = 15,743,854,927,373,574/139,818,356.78
  6. Step 6: Final answer
    x = 112,602,202.53

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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.