Home / 65,355.04-90,204.96-39,870.16

Finding the Fourth Proportional to 65,355.04, 90,204.96 and 39,870.16

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Solution

The fourth proportional to 65,355.04, 90,204.96 and 39,870.16 is: 55,029.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,355.04 : 90,204.96 = 39,870.16 : x
  2. Step 2: Convert to fraction form
    65,355.04/90,204.96 = 39,870.16/x
  3. Step 3: Cross multiply
    65,355.04x = 90,204.96 × 39,870.16
  4. Step 4: Simplify right side
    65,355.04x = 3,596,486,187.99
  5. Step 5: Solve for x
    x = 3,596,486,187.99/65,355.04
  6. Step 6: Final answer
    x = 55,029.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.