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Finding the Fourth Proportional to 103,666.69, 155,458.18 and 40,477.78

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Solution

The fourth proportional to 103,666.69, 155,458.18 and 40,477.78 is: 60,700.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,666.69 : 155,458.18 = 40,477.78 : x
  2. Step 2: Convert to fraction form
    103,666.69/155,458.18 = 40,477.78/x
  3. Step 3: Cross multiply
    103,666.69x = 155,458.18 × 40,477.78
  4. Step 4: Simplify right side
    103,666.69x = 6,292,602,009.24
  5. Step 5: Solve for x
    x = 6,292,602,009.24/103,666.69
  6. Step 6: Final answer
    x = 60,700.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.