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Finding the Fourth Proportional to 72,171,854.60, 108,257,781.90 and 70,046,090.60

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Solution

The fourth proportional to 72,171,854.60, 108,257,781.90 and 70,046,090.60 is: 105,069,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171,854.60 : 108,257,781.90 = 70,046,090.60 : x
  2. Step 2: Convert to fraction form
    72,171,854.60/108,257,781.90 = 70,046,090.60/x
  3. Step 3: Cross multiply
    72,171,854.60x = 108,257,781.90 × 70,046,090.60
  4. Step 4: Simplify right side
    72,171,854.60x = 7,583,034,399,122,440
  5. Step 5: Solve for x
    x = 7,583,034,399,122,440/72,171,854.60
  6. Step 6: Final answer
    x = 105,069,135.90

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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.