Home / 78,467.57-117,700.34-19,303.75

Finding the Fourth Proportional to 78,467.57, 117,700.34 and 19,303.75

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Solution

The fourth proportional to 78,467.57, 117,700.34 and 19,303.75 is: 28,955.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,467.57 : 117,700.34 = 19,303.75 : x
  2. Step 2: Convert to fraction form
    78,467.57/117,700.34 = 19,303.75/x
  3. Step 3: Cross multiply
    78,467.57x = 117,700.34 × 19,303.75
  4. Step 4: Simplify right side
    78,467.57x = 2,272,057,547.51
  5. Step 5: Solve for x
    x = 2,272,057,547.51/78,467.57
  6. Step 6: Final answer
    x = 28,955.37

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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.