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Finding the Fourth Proportional to 286,670.60, 430,005.90 and 73,438.10

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Solution

The fourth proportional to 286,670.60, 430,005.90 and 73,438.10 is: 110,157.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,670.60 : 430,005.90 = 73,438.10 : x
  2. Step 2: Convert to fraction form
    286,670.60/430,005.90 = 73,438.10/x
  3. Step 3: Cross multiply
    286,670.60x = 430,005.90 × 73,438.10
  4. Step 4: Simplify right side
    286,670.60x = 31,578,816,284.79
  5. Step 5: Solve for x
    x = 31,578,816,284.79/286,670.60
  6. Step 6: Final answer
    x = 110,157.15

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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.