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Finding the Fourth Proportional to 42,994.77, 64,484.85 and 19,615.74

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Solution

The fourth proportional to 42,994.77, 64,484.85 and 19,615.74 is: 29,420.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,994.77 : 64,484.85 = 19,615.74 : x
  2. Step 2: Convert to fraction form
    42,994.77/64,484.85 = 19,615.74/x
  3. Step 3: Cross multiply
    42,994.77x = 64,484.85 × 19,615.74
  4. Step 4: Simplify right side
    42,994.77x = 1,264,918,051.54
  5. Step 5: Solve for x
    x = 1,264,918,051.54/42,994.77
  6. Step 6: Final answer
    x = 29,420.28

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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.