Home / 212,218.40-318,331.08-71,980.64

Finding the Fourth Proportional to 212,218.40, 318,331.08 and 71,980.64

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Solution

The fourth proportional to 212,218.40, 318,331.08 and 71,980.64 is: 107,972.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,218.40 : 318,331.08 = 71,980.64 : x
  2. Step 2: Convert to fraction form
    212,218.40/318,331.08 = 71,980.64/x
  3. Step 3: Cross multiply
    212,218.40x = 318,331.08 × 71,980.64
  4. Step 4: Simplify right side
    212,218.40x = 22,913,674,870.29
  5. Step 5: Solve for x
    x = 22,913,674,870.29/212,218.40
  6. Step 6: Final answer
    x = 107,972.14

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1.5x scale

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.