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Finding the Fourth Proportional to 66,567,979.20, 99,684,007.20 and 53,131,051.20

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Solution

The fourth proportional to 66,567,979.20, 99,684,007.20 and 53,131,051.20 is: 79,562,518.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,567,979.20 : 99,684,007.20 = 53,131,051.20 : x
  2. Step 2: Convert to fraction form
    66,567,979.20/99,684,007.20 = 53,131,051.20/x
  3. Step 3: Cross multiply
    66,567,979.20x = 99,684,007.20 × 53,131,051.20
  4. Step 4: Simplify right side
    66,567,979.20x = 5,296,316,090,364,369
  5. Step 5: Solve for x
    x = 5,296,316,090,364,369/66,567,979.20
  6. Step 6: Final answer
    x = 79,562,518.71

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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.