Home / 128,758,739.40-193,138,109.10-117,043,417.80

Finding the Fourth Proportional to 128,758,739.40, 193,138,109.10 and 117,043,417.80

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Solution

The fourth proportional to 128,758,739.40, 193,138,109.10 and 117,043,417.80 is: 175,565,126.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,758,739.40 : 193,138,109.10 = 117,043,417.80 : x
  2. Step 2: Convert to fraction form
    128,758,739.40/193,138,109.10 = 117,043,417.80/x
  3. Step 3: Cross multiply
    128,758,739.40x = 193,138,109.10 × 117,043,417.80
  4. Step 4: Simplify right side
    128,758,739.40x = 22,605,544,396,493,280
  5. Step 5: Solve for x
    x = 22,605,544,396,493,280/128,758,739.40
  6. Step 6: Final answer
    x = 175,565,126.70

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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.