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Finding the Fourth Proportional to 68,616,681.40, 102,830,543.70 and 45,521,961.40

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Solution

The fourth proportional to 68,616,681.40, 102,830,543.70 and 45,521,961.40 is: 68,220,262.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,616,681.40 : 102,830,543.70 = 45,521,961.40 : x
  2. Step 2: Convert to fraction form
    68,616,681.40/102,830,543.70 = 45,521,961.40/x
  3. Step 3: Cross multiply
    68,616,681.40x = 102,830,543.70 × 45,521,961.40
  4. Step 4: Simplify right side
    68,616,681.40x = 4,681,048,041,052,413
  5. Step 5: Solve for x
    x = 4,681,048,041,052,413/68,616,681.40
  6. Step 6: Final answer
    x = 68,220,262.85

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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.