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Finding the Fourth Proportional to 72,946.51, 100,666.20 and 39,412.51

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Solution

The fourth proportional to 72,946.51, 100,666.20 and 39,412.51 is: 54,389.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,946.51 : 100,666.20 = 39,412.51 : x
  2. Step 2: Convert to fraction form
    72,946.51/100,666.20 = 39,412.51/x
  3. Step 3: Cross multiply
    72,946.51x = 100,666.20 × 39,412.51
  4. Step 4: Simplify right side
    72,946.51x = 3,967,507,614.16
  5. Step 5: Solve for x
    x = 3,967,507,614.16/72,946.51
  6. Step 6: Final answer
    x = 54,389.27

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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.