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Finding the Fourth Proportional to 78,919,235.60, 118,378,853.40 and 50,292,280.40

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Solution

The fourth proportional to 78,919,235.60, 118,378,853.40 and 50,292,280.40 is: 75,438,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,919,235.60 : 118,378,853.40 = 50,292,280.40 : x
  2. Step 2: Convert to fraction form
    78,919,235.60/118,378,853.40 = 50,292,280.40/x
  3. Step 3: Cross multiply
    78,919,235.60x = 118,378,853.40 × 50,292,280.40
  4. Step 4: Simplify right side
    78,919,235.60x = 5,953,542,488,623,293
  5. Step 5: Solve for x
    x = 5,953,542,488,623,293/78,919,235.60
  6. Step 6: Final answer
    x = 75,438,420.60

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1.5x scale

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.