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Finding the Fourth Proportional to 35,618,985.20, 53,428,477.80 and 20,502,441.20

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Solution

The fourth proportional to 35,618,985.20, 53,428,477.80 and 20,502,441.20 is: 30,753,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,618,985.20 : 53,428,477.80 = 20,502,441.20 : x
  2. Step 2: Convert to fraction form
    35,618,985.20/53,428,477.80 = 20,502,441.20/x
  3. Step 3: Cross multiply
    35,618,985.20x = 53,428,477.80 × 20,502,441.20
  4. Step 4: Simplify right side
    35,618,985.20x = 1,095,414,224,500,005.25
  5. Step 5: Solve for x
    x = 1,095,414,224,500,005.25/35,618,985.20
  6. Step 6: Final answer
    x = 30,753,661.80

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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.