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Finding the Fourth Proportional to 78,258,889.35, 117,388,334.03 and 78,258,889.35

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Solution

The fourth proportional to 78,258,889.35, 117,388,334.03 and 78,258,889.35 is: 117,388,334.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,258,889.35 : 117,388,334.03 = 78,258,889.35 : x
  2. Step 2: Convert to fraction form
    78,258,889.35/117,388,334.03 = 78,258,889.35/x
  3. Step 3: Cross multiply
    78,258,889.35x = 117,388,334.03 × 78,258,889.35
  4. Step 4: Simplify right side
    78,258,889.35x = 9,186,680,643,443,314
  5. Step 5: Solve for x
    x = 9,186,680,643,443,314/78,258,889.35
  6. Step 6: Final answer
    x = 117,388,334.03

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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.