Home / 128,571,338.51-177,430,784.91-72,828,333.24

Finding the Fourth Proportional to 128,571,338.51, 177,430,784.91 and 72,828,333.24

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Solution

The fourth proportional to 128,571,338.51, 177,430,784.91 and 72,828,333.24 is: 100,504,424.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,571,338.51 : 177,430,784.91 = 72,828,333.24 : x
  2. Step 2: Convert to fraction form
    128,571,338.51/177,430,784.91 = 72,828,333.24/x
  3. Step 3: Cross multiply
    128,571,338.51x = 177,430,784.91 × 72,828,333.24
  4. Step 4: Simplify right side
    128,571,338.51x = 12,921,988,330,460,242
  5. Step 5: Solve for x
    x = 12,921,988,330,460,242/128,571,338.51
  6. Step 6: Final answer
    x = 100,504,424.08

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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.