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Finding the Fourth Proportional to 35,987,970.80, 53,916,637.80 and 20,796,777.20

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Solution

The fourth proportional to 35,987,970.80, 53,916,637.80 and 20,796,777.20 is: 31,157,419.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,987,970.80 : 53,916,637.80 = 20,796,777.20 : x
  2. Step 2: Convert to fraction form
    35,987,970.80/53,916,637.80 = 20,796,777.20/x
  3. Step 3: Cross multiply
    35,987,970.80x = 53,916,637.80 × 20,796,777.20
  4. Step 4: Simplify right side
    35,987,970.80x = 1,121,292,303,699,698
  5. Step 5: Solve for x
    x = 1,121,292,303,699,698/35,987,970.80
  6. Step 6: Final answer
    x = 31,157,419.51

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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.