Home / 438,539.40-657,809.10-106,115.40

Finding the Fourth Proportional to 438,539.40, 657,809.10 and 106,115.40

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Solution

The fourth proportional to 438,539.40, 657,809.10 and 106,115.40 is: 159,173.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,539.40 : 657,809.10 = 106,115.40 : x
  2. Step 2: Convert to fraction form
    438,539.40/657,809.10 = 106,115.40/x
  3. Step 3: Cross multiply
    438,539.40x = 657,809.10 × 106,115.40
  4. Step 4: Simplify right side
    438,539.40x = 69,803,675,770.14
  5. Step 5: Solve for x
    x = 69,803,675,770.14/438,539.40
  6. Step 6: Final answer
    x = 159,173.10

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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.