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Finding the Fourth Proportional to 85,805,999.60, 128,671,674.60 and 28,276,041.20

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Solution

The fourth proportional to 85,805,999.60, 128,671,674.60 and 28,276,041.20 is: 42,401,761.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,805,999.60 : 128,671,674.60 = 28,276,041.20 : x
  2. Step 2: Convert to fraction form
    85,805,999.60/128,671,674.60 = 28,276,041.20/x
  3. Step 3: Cross multiply
    85,805,999.60x = 128,671,674.60 × 28,276,041.20
  4. Step 4: Simplify right side
    85,805,999.60x = 3,638,325,572,262,593.50
  5. Step 5: Solve for x
    x = 3,638,325,572,262,593.50/85,805,999.60
  6. Step 6: Final answer
    x = 42,401,761.99

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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.