Home / 128,950,658.40-193,425,987.60-121,386,165.60

Finding the Fourth Proportional to 128,950,658.40, 193,425,987.60 and 121,386,165.60

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Solution

The fourth proportional to 128,950,658.40, 193,425,987.60 and 121,386,165.60 is: 182,079,248.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,950,658.40 : 193,425,987.60 = 121,386,165.60 : x
  2. Step 2: Convert to fraction form
    128,950,658.40/193,425,987.60 = 121,386,165.60/x
  3. Step 3: Cross multiply
    128,950,658.40x = 193,425,987.60 × 121,386,165.60
  4. Step 4: Simplify right side
    128,950,658.40x = 23,479,238,962,157,144
  5. Step 5: Solve for x
    x = 23,479,238,962,157,144/128,950,658.40
  6. Step 6: Final answer
    x = 182,079,248.40

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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.