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Finding the Fourth Proportional to 78,343,705.40, 117,515,558.10 and 78,343,705.40

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Solution

The fourth proportional to 78,343,705.40, 117,515,558.10 and 78,343,705.40 is: 117,515,558.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343,705.40 : 117,515,558.10 = 78,343,705.40 : x
  2. Step 2: Convert to fraction form
    78,343,705.40/117,515,558.10 = 78,343,705.40/x
  3. Step 3: Cross multiply
    78,343,705.40x = 117,515,558.10 × 78,343,705.40
  4. Step 4: Simplify right side
    78,343,705.40x = 9,206,604,263,702,984
  5. Step 5: Solve for x
    x = 9,206,604,263,702,984/78,343,705.40
  6. Step 6: Final answer
    x = 117,515,558.10

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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.