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Finding the Fourth Proportional to 76,390.40, 114,609.90 and 48,484.28

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Solution

The fourth proportional to 76,390.40, 114,609.90 and 48,484.28 is: 72,741.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,390.40 : 114,609.90 = 48,484.28 : x
  2. Step 2: Convert to fraction form
    76,390.40/114,609.90 = 48,484.28/x
  3. Step 3: Cross multiply
    76,390.40x = 114,609.90 × 48,484.28
  4. Step 4: Simplify right side
    76,390.40x = 5,556,778,482.37
  5. Step 5: Solve for x
    x = 5,556,778,482.37/76,390.40
  6. Step 6: Final answer
    x = 72,741.84

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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.