Home / 128,705,123.40-193,057,685.10-68,238,947.40

Finding the Fourth Proportional to 128,705,123.40, 193,057,685.10 and 68,238,947.40

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Solution

The fourth proportional to 128,705,123.40, 193,057,685.10 and 68,238,947.40 is: 102,358,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,705,123.40 : 193,057,685.10 = 68,238,947.40 : x
  2. Step 2: Convert to fraction form
    128,705,123.40/193,057,685.10 = 68,238,947.40/x
  3. Step 3: Cross multiply
    128,705,123.40x = 193,057,685.10 × 68,238,947.40
  4. Step 4: Simplify right side
    128,705,123.40x = 13,174,053,218,704,664
  5. Step 5: Solve for x
    x = 13,174,053,218,704,664/128,705,123.40
  6. Step 6: Final answer
    x = 102,358,421.10

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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.