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Finding the Fourth Proportional to 212,577.88, 318,911.80 and 70,415.11

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Solution

The fourth proportional to 212,577.88, 318,911.80 and 70,415.11 is: 105,637.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,577.88 : 318,911.80 = 70,415.11 : x
  2. Step 2: Convert to fraction form
    212,577.88/318,911.80 = 70,415.11/x
  3. Step 3: Cross multiply
    212,577.88x = 318,911.80 × 70,415.11
  4. Step 4: Simplify right side
    212,577.88x = 22,456,209,477.30
  5. Step 5: Solve for x
    x = 22,456,209,477.30/212,577.88
  6. Step 6: Final answer
    x = 105,637.56

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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.