Home / 128,427,141.40-177,228,556.23-69,688,312.72

Finding the Fourth Proportional to 128,427,141.40, 177,228,556.23 and 69,688,312.72

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Solution

The fourth proportional to 128,427,141.40, 177,228,556.23 and 69,688,312.72 is: 96,169,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,427,141.40 : 177,228,556.23 = 69,688,312.72 : x
  2. Step 2: Convert to fraction form
    128,427,141.40/177,228,556.23 = 69,688,312.72/x
  3. Step 3: Cross multiply
    128,427,141.40x = 177,228,556.23 × 69,688,312.72
  4. Step 4: Simplify right side
    128,427,141.40x = 12,350,759,049,470,344
  5. Step 5: Solve for x
    x = 12,350,759,049,470,344/128,427,141.40
  6. Step 6: Final answer
    x = 96,169,383.78

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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.