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Finding the Fourth Proportional to 57,004,410.21, 78,663,978.54 and 30,898,367.52

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Solution

The fourth proportional to 57,004,410.21, 78,663,978.54 and 30,898,367.52 is: 42,638,604.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,004,410.21 : 78,663,978.54 = 30,898,367.52 : x
  2. Step 2: Convert to fraction form
    57,004,410.21/78,663,978.54 = 30,898,367.52/x
  3. Step 3: Cross multiply
    57,004,410.21x = 78,663,978.54 × 30,898,367.52
  4. Step 4: Simplify right side
    57,004,410.21x = 2,430,588,519,514,313
  5. Step 5: Solve for x
    x = 2,430,588,519,514,313/57,004,410.21
  6. Step 6: Final answer
    x = 42,638,604.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.