Home / 64,515.04-89,040.40-39,379.12

Finding the Fourth Proportional to 64,515.04, 89,040.40 and 39,379.12

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Solution

The fourth proportional to 64,515.04, 89,040.40 and 39,379.12 is: 54,349.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,515.04 : 89,040.40 = 39,379.12 : x
  2. Step 2: Convert to fraction form
    64,515.04/89,040.40 = 39,379.12/x
  3. Step 3: Cross multiply
    64,515.04x = 89,040.40 × 39,379.12
  4. Step 4: Simplify right side
    64,515.04x = 3,506,332,596.45
  5. Step 5: Solve for x
    x = 3,506,332,596.45/64,515.04
  6. Step 6: Final answer
    x = 54,349.07

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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.