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Finding the Fourth Proportional to 72,402.47, 99,918.11 and 40,570.19

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Solution

The fourth proportional to 72,402.47, 99,918.11 and 40,570.19 is: 55,988.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,402.47 : 99,918.11 = 40,570.19 : x
  2. Step 2: Convert to fraction form
    72,402.47/99,918.11 = 40,570.19/x
  3. Step 3: Cross multiply
    72,402.47x = 99,918.11 × 40,570.19
  4. Step 4: Simplify right side
    72,402.47x = 4,053,696,707.14
  5. Step 5: Solve for x
    x = 4,053,696,707.14/72,402.47
  6. Step 6: Final answer
    x = 55,988.38

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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.