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Finding the Fourth Proportional to 66,361.86, 99,485.55 and 31,276.98

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Solution

The fourth proportional to 66,361.86, 99,485.55 and 31,276.98 is: 46,888.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,361.86 : 99,485.55 = 31,276.98 : x
  2. Step 2: Convert to fraction form
    66,361.86/99,485.55 = 31,276.98/x
  3. Step 3: Cross multiply
    66,361.86x = 99,485.55 × 31,276.98
  4. Step 4: Simplify right side
    66,361.86x = 3,111,607,557.64
  5. Step 5: Solve for x
    x = 3,111,607,557.64/66,361.86
  6. Step 6: Final answer
    x = 46,888.49

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1.5x scale

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.