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Finding the Fourth Proportional to 67,985,622.90, 101,978,306.76 and 21,302,682.30

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Solution

The fourth proportional to 67,985,622.90, 101,978,306.76 and 21,302,682.30 is: 31,953,983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985,622.90 : 101,978,306.76 = 21,302,682.30 : x
  2. Step 2: Convert to fraction form
    67,985,622.90/101,978,306.76 = 21,302,682.30/x
  3. Step 3: Cross multiply
    67,985,622.90x = 101,978,306.76 × 21,302,682.30
  4. Step 4: Simplify right side
    67,985,622.90x = 2,172,411,470,400,222.50
  5. Step 5: Solve for x
    x = 2,172,411,470,400,222.50/67,985,622.90
  6. Step 6: Final answer
    x = 31,953,983.47

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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.