Home / 78,723,806.40-118,085,709.60-21,215,966.40

Finding the Fourth Proportional to 78,723,806.40, 118,085,709.60 and 21,215,966.40

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Solution

The fourth proportional to 78,723,806.40, 118,085,709.60 and 21,215,966.40 is: 31,823,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,723,806.40 : 118,085,709.60 = 21,215,966.40 : x
  2. Step 2: Convert to fraction form
    78,723,806.40/118,085,709.60 = 21,215,966.40/x
  3. Step 3: Cross multiply
    78,723,806.40x = 118,085,709.60 × 21,215,966.40
  4. Step 4: Simplify right side
    78,723,806.40x = 2,505,302,447,193,757
  5. Step 5: Solve for x
    x = 2,505,302,447,193,757/78,723,806.40
  6. Step 6: Final answer
    x = 31,823,949.60

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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.