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Finding the Fourth Proportional to 78,894,409.80, 118,341,614.70 and 51,684,630.60

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Solution

The fourth proportional to 78,894,409.80, 118,341,614.70 and 51,684,630.60 is: 77,526,945.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,894,409.80 : 118,341,614.70 = 51,684,630.60 : x
  2. Step 2: Convert to fraction form
    78,894,409.80/118,341,614.70 = 51,684,630.60/x
  3. Step 3: Cross multiply
    78,894,409.80x = 118,341,614.70 × 51,684,630.60
  4. Step 4: Simplify right side
    78,894,409.80x = 6,116,442,640,377,030
  5. Step 5: Solve for x
    x = 6,116,442,640,377,030/78,894,409.80
  6. Step 6: Final answer
    x = 77,526,945.90

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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.