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Finding the Fourth Proportional to 99,792,146.70, 149,688,220.05 and 56,793,977.10

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Solution

The fourth proportional to 99,792,146.70, 149,688,220.05 and 56,793,977.10 is: 85,190,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,792,146.70 : 149,688,220.05 = 56,793,977.10 : x
  2. Step 2: Convert to fraction form
    99,792,146.70/149,688,220.05 = 56,793,977.10/x
  3. Step 3: Cross multiply
    99,792,146.70x = 149,688,220.05 × 56,793,977.10
  4. Step 4: Simplify right side
    99,792,146.70x = 8,501,389,341,659,462
  5. Step 5: Solve for x
    x = 8,501,389,341,659,462/99,792,146.70
  6. Step 6: Final answer
    x = 85,190,965.65

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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.