Home / 78,584,672.70-117,877,009.05-40,320,920.70

Finding the Fourth Proportional to 78,584,672.70, 117,877,009.05 and 40,320,920.70

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Solution

The fourth proportional to 78,584,672.70, 117,877,009.05 and 40,320,920.70 is: 60,481,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,584,672.70 : 117,877,009.05 = 40,320,920.70 : x
  2. Step 2: Convert to fraction form
    78,584,672.70/117,877,009.05 = 40,320,920.70/x
  3. Step 3: Cross multiply
    78,584,672.70x = 117,877,009.05 × 40,320,920.70
  4. Step 4: Simplify right side
    78,584,672.70x = 4,752,909,534,258,233
  5. Step 5: Solve for x
    x = 4,752,909,534,258,233/78,584,672.70
  6. Step 6: Final answer
    x = 60,481,381.05

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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.