Home / 78,938,953.70-118,399,385.26-20,652,258.54

Finding the Fourth Proportional to 78,938,953.70, 118,399,385.26 and 20,652,258.54

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Solution

The fourth proportional to 78,938,953.70, 118,399,385.26 and 20,652,258.54 is: 30,976,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938,953.70 : 118,399,385.26 = 20,652,258.54 : x
  2. Step 2: Convert to fraction form
    78,938,953.70/118,399,385.26 = 20,652,258.54/x
  3. Step 3: Cross multiply
    78,938,953.70x = 118,399,385.26 × 20,652,258.54
  4. Step 4: Simplify right side
    78,938,953.70x = 2,445,214,715,366,585
  5. Step 5: Solve for x
    x = 2,445,214,715,366,585/78,938,953.70
  6. Step 6: Final answer
    x = 30,976,021.35

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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.