Home / 128,705,343.40-193,058,015.10-68,239,167.40

Finding the Fourth Proportional to 128,705,343.40, 193,058,015.10 and 68,239,167.40

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Solution

The fourth proportional to 128,705,343.40, 193,058,015.10 and 68,239,167.40 is: 102,358,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,705,343.40 : 193,058,015.10 = 68,239,167.40 : x
  2. Step 2: Convert to fraction form
    128,705,343.40/193,058,015.10 = 68,239,167.40/x
  3. Step 3: Cross multiply
    128,705,343.40x = 193,058,015.10 × 68,239,167.40
  4. Step 4: Simplify right side
    128,705,343.40x = 13,174,118,210,320,628
  5. Step 5: Solve for x
    x = 13,174,118,210,320,628/128,705,343.40
  6. Step 6: Final answer
    x = 102,358,751.10

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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.