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Finding the Fourth Proportional to 85,552,509.60, 128,328,764.40 and 28,030,910.40

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Solution

The fourth proportional to 85,552,509.60, 128,328,764.40 and 28,030,910.40 is: 42,046,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,552,509.60 : 128,328,764.40 = 28,030,910.40 : x
  2. Step 2: Convert to fraction form
    85,552,509.60/128,328,764.40 = 28,030,910.40/x
  3. Step 3: Cross multiply
    85,552,509.60x = 128,328,764.40 × 28,030,910.40
  4. Step 4: Simplify right side
    85,552,509.60x = 3,597,172,096,639,109.50
  5. Step 5: Solve for x
    x = 3,597,172,096,639,109.50/85,552,509.60
  6. Step 6: Final answer
    x = 42,046,365.60

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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.