Home / 128,966,627.20-193,197,998.40-77,696,348.80

Finding the Fourth Proportional to 128,966,627.20, 193,197,998.40 and 77,696,348.80

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Solution

The fourth proportional to 128,966,627.20, 193,197,998.40 and 77,696,348.80 is: 116,392,739.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,966,627.20 : 193,197,998.40 = 77,696,348.80 : x
  2. Step 2: Convert to fraction form
    128,966,627.20/193,197,998.40 = 77,696,348.80/x
  3. Step 3: Cross multiply
    128,966,627.20x = 193,197,998.40 × 77,696,348.80
  4. Step 4: Simplify right side
    128,966,627.20x = 15,010,779,071,148,242
  5. Step 5: Solve for x
    x = 15,010,779,071,148,242/128,966,627.20
  6. Step 6: Final answer
    x = 116,392,739.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.