Home / 71,820.12-99,137.34-51,688.92

Finding the Fourth Proportional to 71,820.12, 99,137.34 and 51,688.92

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Solution

The fourth proportional to 71,820.12, 99,137.34 and 51,688.92 is: 71,349.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,820.12 : 99,137.34 = 51,688.92 : x
  2. Step 2: Convert to fraction form
    71,820.12/99,137.34 = 51,688.92/x
  3. Step 3: Cross multiply
    71,820.12x = 99,137.34 × 51,688.92
  4. Step 4: Simplify right side
    71,820.12x = 5,124,302,036.27
  5. Step 5: Solve for x
    x = 5,124,302,036.27/71,820.12
  6. Step 6: Final answer
    x = 71,349.12

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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.