Home / 72,121.05-99,526.80-39,854.77

Finding the Fourth Proportional to 72,121.05, 99,526.80 and 39,854.77

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Solution

The fourth proportional to 72,121.05, 99,526.80 and 39,854.77 is: 54,999.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,121.05 : 99,526.80 = 39,854.77 : x
  2. Step 2: Convert to fraction form
    72,121.05/99,526.80 = 39,854.77/x
  3. Step 3: Cross multiply
    72,121.05x = 99,526.80 × 39,854.77
  4. Step 4: Simplify right side
    72,121.05x = 3,966,617,722.84
  5. Step 5: Solve for x
    x = 3,966,617,722.84/72,121.05
  6. Step 6: Final answer
    x = 54,999.44

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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.