Home / 121,991,798.61-168,351,606.96-66,239,568.86

Finding the Fourth Proportional to 121,991,798.61, 168,351,606.96 and 66,239,568.86

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Solution

The fourth proportional to 121,991,798.61, 168,351,606.96 and 66,239,568.86 is: 91,412,193.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,991,798.61 : 168,351,606.96 = 66,239,568.86 : x
  2. Step 2: Convert to fraction form
    121,991,798.61/168,351,606.96 = 66,239,568.86/x
  3. Step 3: Cross multiply
    121,991,798.61x = 168,351,606.96 × 66,239,568.86
  4. Step 4: Simplify right side
    121,991,798.61x = 11,151,537,861,918,576
  5. Step 5: Solve for x
    x = 11,151,537,861,918,576/121,991,798.61
  6. Step 6: Final answer
    x = 91,412,193.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.