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Finding the Fourth Proportional to 389,999.76, 585,062.50 and 120,127.77

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Solution

The fourth proportional to 389,999.76, 585,062.50 and 120,127.77 is: 180,211.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,999.76 : 585,062.50 = 120,127.77 : x
  2. Step 2: Convert to fraction form
    389,999.76/585,062.50 = 120,127.77/x
  3. Step 3: Cross multiply
    389,999.76x = 585,062.50 × 120,127.77
  4. Step 4: Simplify right side
    389,999.76x = 70,282,254,457.54
  5. Step 5: Solve for x
    x = 70,282,254,457.54/389,999.76
  6. Step 6: Final answer
    x = 180,211.02

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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.