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Finding the Fourth Proportional to 70,970.50, 106,455.75 and 39,808.18

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Solution

The fourth proportional to 70,970.50, 106,455.75 and 39,808.18 is: 59,712.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,970.50 : 106,455.75 = 39,808.18 : x
  2. Step 2: Convert to fraction form
    70,970.50/106,455.75 = 39,808.18/x
  3. Step 3: Cross multiply
    70,970.50x = 106,455.75 × 39,808.18
  4. Step 4: Simplify right side
    70,970.50x = 4,237,809,658.04
  5. Step 5: Solve for x
    x = 4,237,809,658.04/70,970.50
  6. Step 6: Final answer
    x = 59,712.27

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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.