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Finding the Fourth Proportional to 70,662.84, 106,009.85 and 39,118.90

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Solution

The fourth proportional to 70,662.84, 106,009.85 and 39,118.90 is: 58,686.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,662.84 : 106,009.85 = 39,118.90 : x
  2. Step 2: Convert to fraction form
    70,662.84/106,009.85 = 39,118.90/x
  3. Step 3: Cross multiply
    70,662.84x = 106,009.85 × 39,118.90
  4. Step 4: Simplify right side
    70,662.84x = 4,146,988,721.17
  5. Step 5: Solve for x
    x = 4,146,988,721.17/70,662.84
  6. Step 6: Final answer
    x = 58,686.98

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1.5x scale

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.