Home / 128,286,045.56-177,180,888.81-86,961,193.40

Finding the Fourth Proportional to 128,286,045.56, 177,180,888.81 and 86,961,193.40

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Solution

The fourth proportional to 128,286,045.56, 177,180,888.81 and 86,961,193.40 is: 120,105,514.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,286,045.56 : 177,180,888.81 = 86,961,193.40 : x
  2. Step 2: Convert to fraction form
    128,286,045.56/177,180,888.81 = 86,961,193.40/x
  3. Step 3: Cross multiply
    128,286,045.56x = 177,180,888.81 × 86,961,193.40
  4. Step 4: Simplify right side
    128,286,045.56x = 15,407,861,537,704,400
  5. Step 5: Solve for x
    x = 15,407,861,537,704,400/128,286,045.56
  6. Step 6: Final answer
    x = 120,105,514.76

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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.