Home / 387,699.63-581,577.18-103,388.67

Finding the Fourth Proportional to 387,699.63, 581,577.18 and 103,388.67

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Solution

The fourth proportional to 387,699.63, 581,577.18 and 103,388.67 is: 155,090.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,699.63 : 581,577.18 = 103,388.67 : x
  2. Step 2: Convert to fraction form
    387,699.63/581,577.18 = 103,388.67/x
  3. Step 3: Cross multiply
    387,699.63x = 581,577.18 × 103,388.67
  4. Step 4: Simplify right side
    387,699.63x = 60,128,491,142.55
  5. Step 5: Solve for x
    x = 60,128,491,142.55/387,699.63
  6. Step 6: Final answer
    x = 155,090.40

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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.