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Finding the Fourth Proportional to 72,412.07, 99,927.15 and 39,706.03

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Solution

The fourth proportional to 72,412.07, 99,927.15 and 39,706.03 is: 54,793.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,412.07 : 99,927.15 = 39,706.03 : x
  2. Step 2: Convert to fraction form
    72,412.07/99,927.15 = 39,706.03/x
  3. Step 3: Cross multiply
    72,412.07x = 99,927.15 × 39,706.03
  4. Step 4: Simplify right side
    72,412.07x = 3,967,709,916.08
  5. Step 5: Solve for x
    x = 3,967,709,916.08/72,412.07
  6. Step 6: Final answer
    x = 54,793.49

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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.