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Finding the Fourth Proportional to 128,700,986.74, 193,051,480.11 and 128,700,986.74

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Solution

The fourth proportional to 128,700,986.74, 193,051,480.11 and 128,700,986.74 is: 193,051,480.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,700,986.74 : 193,051,480.11 = 128,700,986.74 : x
  2. Step 2: Convert to fraction form
    128,700,986.74/193,051,480.11 = 128,700,986.74/x
  3. Step 3: Cross multiply
    128,700,986.74x = 193,051,480.11 × 128,700,986.74
  4. Step 4: Simplify right side
    128,700,986.74x = 24,845,915,980,809,224
  5. Step 5: Solve for x
    x = 24,845,915,980,809,224/128,700,986.74
  6. Step 6: Final answer
    x = 193,051,480.11

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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.