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Finding the Fourth Proportional to 72,893,969.88, 100,595,777.95 and 40,301,021.40

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Solution

The fourth proportional to 72,893,969.88, 100,595,777.95 and 40,301,021.40 is: 55,616,570.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,893,969.88 : 100,595,777.95 = 40,301,021.40 : x
  2. Step 2: Convert to fraction form
    72,893,969.88/100,595,777.95 = 40,301,021.40/x
  3. Step 3: Cross multiply
    72,893,969.88x = 100,595,777.95 × 40,301,021.40
  4. Step 4: Simplify right side
    72,893,969.88x = 4,054,112,599,912,598
  5. Step 5: Solve for x
    x = 4,054,112,599,912,598/72,893,969.88
  6. Step 6: Final answer
    x = 55,616,570.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.