Home / 78,480.04-117,654.37-36,390.16

Finding the Fourth Proportional to 78,480.04, 117,654.37 and 36,390.16

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Solution

The fourth proportional to 78,480.04, 117,654.37 and 36,390.16 is: 54,554.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,480.04 : 117,654.37 = 36,390.16 : x
  2. Step 2: Convert to fraction form
    78,480.04/117,654.37 = 36,390.16/x
  3. Step 3: Cross multiply
    78,480.04x = 117,654.37 × 36,390.16
  4. Step 4: Simplify right side
    78,480.04x = 4,281,461,609.79
  5. Step 5: Solve for x
    x = 4,281,461,609.79/78,480.04
  6. Step 6: Final answer
    x = 54,554.78

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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.