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Finding the Fourth Proportional to 70,312,739.60, 105,469,109.40 and 43,102,960.40

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Solution

The fourth proportional to 70,312,739.60, 105,469,109.40 and 43,102,960.40 is: 64,654,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,312,739.60 : 105,469,109.40 = 43,102,960.40 : x
  2. Step 2: Convert to fraction form
    70,312,739.60/105,469,109.40 = 43,102,960.40/x
  3. Step 3: Cross multiply
    70,312,739.60x = 105,469,109.40 × 43,102,960.40
  4. Step 4: Simplify right side
    70,312,739.60x = 4,546,030,845,891,468
  5. Step 5: Solve for x
    x = 4,546,030,845,891,468/70,312,739.60
  6. Step 6: Final answer
    x = 64,654,440.60

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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.