Home / 145,308.72-217,557.06-78,509.51

Finding the Fourth Proportional to 145,308.72, 217,557.06 and 78,509.51

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Solution

The fourth proportional to 145,308.72, 217,557.06 and 78,509.51 is: 117,544.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,308.72 : 217,557.06 = 78,509.51 : x
  2. Step 2: Convert to fraction form
    145,308.72/217,557.06 = 78,509.51/x
  3. Step 3: Cross multiply
    145,308.72x = 217,557.06 × 78,509.51
  4. Step 4: Simplify right side
    145,308.72x = 17,080,298,177.64
  5. Step 5: Solve for x
    x = 17,080,298,177.64/145,308.72
  6. Step 6: Final answer
    x = 117,544.89

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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.