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Finding the Fourth Proportional to 78,635,114.70, 117,952,672.05 and 70,982,364.30

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Solution

The fourth proportional to 78,635,114.70, 117,952,672.05 and 70,982,364.30 is: 106,473,546.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,635,114.70 : 117,952,672.05 = 70,982,364.30 : x
  2. Step 2: Convert to fraction form
    78,635,114.70/117,952,672.05 = 70,982,364.30/x
  3. Step 3: Cross multiply
    78,635,114.70x = 117,952,672.05 × 70,982,364.30
  4. Step 4: Simplify right side
    78,635,114.70x = 8,372,559,537,611,527
  5. Step 5: Solve for x
    x = 8,372,559,537,611,527/78,635,114.70
  6. Step 6: Final answer
    x = 106,473,546.45

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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.