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Finding the Fourth Proportional to 28,076,693.40, 42,115,040.10 and 28,076,693.40

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Solution

The fourth proportional to 28,076,693.40, 42,115,040.10 and 28,076,693.40 is: 42,115,040.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076,693.40 : 42,115,040.10 = 28,076,693.40 : x
  2. Step 2: Convert to fraction form
    28,076,693.40/42,115,040.10 = 28,076,693.40/x
  3. Step 3: Cross multiply
    28,076,693.40x = 42,115,040.10 × 28,076,693.40
  4. Step 4: Simplify right side
    28,076,693.40x = 1,182,451,068,416,405.25
  5. Step 5: Solve for x
    x = 1,182,451,068,416,405.25/28,076,693.40
  6. Step 6: Final answer
    x = 42,115,040.10

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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.