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Finding the Fourth Proportional to 28,136,005.70, 39,479,987.50 and 28,136,005.70

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Solution

The fourth proportional to 28,136,005.70, 39,479,987.50 and 28,136,005.70 is: 39,479,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136,005.70 : 39,479,987.50 = 28,136,005.70 : x
  2. Step 2: Convert to fraction form
    28,136,005.70/39,479,987.50 = 28,136,005.70/x
  3. Step 3: Cross multiply
    28,136,005.70x = 39,479,987.50 × 28,136,005.70
  4. Step 4: Simplify right side
    28,136,005.70x = 1,110,809,153,335,928.75
  5. Step 5: Solve for x
    x = 1,110,809,153,335,928.75/28,136,005.70
  6. Step 6: Final answer
    x = 39,479,987.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.