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Finding the Fourth Proportional to 28,985,125.80, 40,638,895.80 and 28,985,125.80

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Solution

The fourth proportional to 28,985,125.80, 40,638,895.80 and 28,985,125.80 is: 40,638,895.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,985,125.80 : 40,638,895.80 = 28,985,125.80 : x
  2. Step 2: Convert to fraction form
    28,985,125.80/40,638,895.80 = 28,985,125.80/x
  3. Step 3: Cross multiply
    28,985,125.80x = 40,638,895.80 × 28,985,125.80
  4. Step 4: Simplify right side
    28,985,125.80x = 1,177,923,507,136,091.50
  5. Step 5: Solve for x
    x = 1,177,923,507,136,091.50/28,985,125.80
  6. Step 6: Final answer
    x = 40,638,895.80

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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.