Home / 78,304.07-117,455.09-19,140.25

Finding the Fourth Proportional to 78,304.07, 117,455.09 and 19,140.25

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Solution

The fourth proportional to 78,304.07, 117,455.09 and 19,140.25 is: 28,710.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,304.07 : 117,455.09 = 19,140.25 : x
  2. Step 2: Convert to fraction form
    78,304.07/117,455.09 = 19,140.25/x
  3. Step 3: Cross multiply
    78,304.07x = 117,455.09 × 19,140.25
  4. Step 4: Simplify right side
    78,304.07x = 2,248,119,786.37
  5. Step 5: Solve for x
    x = 2,248,119,786.37/78,304.07
  6. Step 6: Final answer
    x = 28,710.13

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1.5x scale

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.