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Finding the Fourth Proportional to 78,897,886.80, 118,346,830.20 and 36,430,558.80

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Solution

The fourth proportional to 78,897,886.80, 118,346,830.20 and 36,430,558.80 is: 54,645,838.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897,886.80 : 118,346,830.20 = 36,430,558.80 : x
  2. Step 2: Convert to fraction form
    78,897,886.80/118,346,830.20 = 36,430,558.80/x
  3. Step 3: Cross multiply
    78,897,886.80x = 118,346,830.20 × 36,430,558.80
  4. Step 4: Simplify right side
    78,897,886.80x = 4,311,441,156,394,715.50
  5. Step 5: Solve for x
    x = 4,311,441,156,394,715.50/78,897,886.80
  6. Step 6: Final answer
    x = 54,645,838.20

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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.