Home / 145,431.02-217,922.96-86,148.74

Finding the Fourth Proportional to 145,431.02, 217,922.96 and 86,148.74

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Solution

The fourth proportional to 145,431.02, 217,922.96 and 86,148.74 is: 129,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,431.02 : 217,922.96 = 86,148.74 : x
  2. Step 2: Convert to fraction form
    145,431.02/217,922.96 = 86,148.74/x
  3. Step 3: Cross multiply
    145,431.02x = 217,922.96 × 86,148.74
  4. Step 4: Simplify right side
    145,431.02x = 18,773,787,546.83
  5. Step 5: Solve for x
    x = 18,773,787,546.83/145,431.02
  6. Step 6: Final answer
    x = 129,090.67

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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.