Home / 74,139.72-102,320.13-42,313.38

Finding the Fourth Proportional to 74,139.72, 102,320.13 and 42,313.38

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Solution

The fourth proportional to 74,139.72, 102,320.13 and 42,313.38 is: 58,396.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,139.72 : 102,320.13 = 42,313.38 : x
  2. Step 2: Convert to fraction form
    74,139.72/102,320.13 = 42,313.38/x
  3. Step 3: Cross multiply
    74,139.72x = 102,320.13 × 42,313.38
  4. Step 4: Simplify right side
    74,139.72x = 4,329,510,542.34
  5. Step 5: Solve for x
    x = 4,329,510,542.34/74,139.72
  6. Step 6: Final answer
    x = 58,396.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.