Home / 128,545,591.26-177,447,196.47-86,786,199.81

Finding the Fourth Proportional to 128,545,591.26, 177,447,196.47 and 86,786,199.81

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Solution

The fourth proportional to 128,545,591.26, 177,447,196.47 and 86,786,199.81 is: 119,801,602.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,545,591.26 : 177,447,196.47 = 86,786,199.81 : x
  2. Step 2: Convert to fraction form
    128,545,591.26/177,447,196.47 = 86,786,199.81/x
  3. Step 3: Cross multiply
    128,545,591.26x = 177,447,196.47 × 86,786,199.81
  4. Step 4: Simplify right side
    128,545,591.26x = 15,399,967,848,569,746
  5. Step 5: Solve for x
    x = 15,399,967,848,569,746/128,545,591.26
  6. Step 6: Final answer
    x = 119,801,602.67

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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.