Home / 78,507.63-117,800.40-31,121.72

Finding the Fourth Proportional to 78,507.63, 117,800.40 and 31,121.72

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Solution

The fourth proportional to 78,507.63, 117,800.40 and 31,121.72 is: 46,698.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,507.63 : 117,800.40 = 31,121.72 : x
  2. Step 2: Convert to fraction form
    78,507.63/117,800.40 = 31,121.72/x
  3. Step 3: Cross multiply
    78,507.63x = 117,800.40 × 31,121.72
  4. Step 4: Simplify right side
    78,507.63x = 3,666,150,909.08
  5. Step 5: Solve for x
    x = 3,666,150,909.08/78,507.63
  6. Step 6: Final answer
    x = 46,698.02

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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.