Home / 113,931.72-157,214.52-66,187.08

Finding the Fourth Proportional to 113,931.72, 157,214.52 and 66,187.08

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Solution

The fourth proportional to 113,931.72, 157,214.52 and 66,187.08 is: 91,331.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,931.72 : 157,214.52 = 66,187.08 : x
  2. Step 2: Convert to fraction form
    113,931.72/157,214.52 = 66,187.08/x
  3. Step 3: Cross multiply
    113,931.72x = 157,214.52 × 66,187.08
  4. Step 4: Simplify right side
    113,931.72x = 10,405,570,012.40
  5. Step 5: Solve for x
    x = 10,405,570,012.40/113,931.72
  6. Step 6: Final answer
    x = 91,331.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.