Home / 121,991,911.38-168,351,762.83-66,239,681.45

Finding the Fourth Proportional to 121,991,911.38, 168,351,762.83 and 66,239,681.45

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Solution

The fourth proportional to 121,991,911.38, 168,351,762.83 and 66,239,681.45 is: 91,412,348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,991,911.38 : 168,351,762.83 = 66,239,681.45 : x
  2. Step 2: Convert to fraction form
    121,991,911.38/168,351,762.83 = 66,239,681.45/x
  3. Step 3: Cross multiply
    121,991,911.38x = 168,351,762.83 × 66,239,681.45
  4. Step 4: Simplify right side
    121,991,911.38x = 11,151,567,140,232,192
  5. Step 5: Solve for x
    x = 11,151,567,140,232,192/121,991,911.38
  6. Step 6: Final answer
    x = 91,412,348.69

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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.