Home / 82,421.40-123,534.90-42,958.20

Finding the Fourth Proportional to 82,421.40, 123,534.90 and 42,958.20

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Solution

The fourth proportional to 82,421.40, 123,534.90 and 42,958.20 is: 64,386.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,421.40 : 123,534.90 = 42,958.20 : x
  2. Step 2: Convert to fraction form
    82,421.40/123,534.90 = 42,958.20/x
  3. Step 3: Cross multiply
    82,421.40x = 123,534.90 × 42,958.20
  4. Step 4: Simplify right side
    82,421.40x = 5,306,836,941.18
  5. Step 5: Solve for x
    x = 5,306,836,941.18/82,421.40
  6. Step 6: Final answer
    x = 64,386.64

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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.