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Finding the Fourth Proportional to 93,073,978.42, 139,429,343.03 and 72,507,398.54

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Solution

The fourth proportional to 93,073,978.42, 139,429,343.03 and 72,507,398.54 is: 108,619,606.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,073,978.42 : 139,429,343.03 = 72,507,398.54 : x
  2. Step 2: Convert to fraction form
    93,073,978.42/139,429,343.03 = 72,507,398.54/x
  3. Step 3: Cross multiply
    93,073,978.42x = 139,429,343.03 × 72,507,398.54
  4. Step 4: Simplify right side
    93,073,978.42x = 10,109,658,942,186,898
  5. Step 5: Solve for x
    x = 10,109,658,942,186,898/93,073,978.42
  6. Step 6: Final answer
    x = 108,619,606.83

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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.