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Finding the Fourth Proportional to 66,430,201.80, 99,645,302.70 and 45,713,967.32

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Solution

The fourth proportional to 66,430,201.80, 99,645,302.70 and 45,713,967.32 is: 68,570,950.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,430,201.80 : 99,645,302.70 = 45,713,967.32 : x
  2. Step 2: Convert to fraction form
    66,430,201.80/99,645,302.70 = 45,713,967.32/x
  3. Step 3: Cross multiply
    66,430,201.80x = 99,645,302.70 × 45,713,967.32
  4. Step 4: Simplify right side
    66,430,201.80x = 4,555,182,111,468,421
  5. Step 5: Solve for x
    x = 4,555,182,111,468,421/66,430,201.80
  6. Step 6: Final answer
    x = 68,570,950.98

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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.