Home / 113,877.32-157,139.07-66,140.78

Finding the Fourth Proportional to 113,877.32, 157,139.07 and 66,140.78

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Solution

The fourth proportional to 113,877.32, 157,139.07 and 66,140.78 is: 91,267.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,877.32 : 157,139.07 = 66,140.78 : x
  2. Step 2: Convert to fraction form
    113,877.32/157,139.07 = 66,140.78/x
  3. Step 3: Cross multiply
    113,877.32x = 157,139.07 × 66,140.78
  4. Step 4: Simplify right side
    113,877.32x = 10,393,300,658.27
  5. Step 5: Solve for x
    x = 10,393,300,658.27/113,877.32
  6. Step 6: Final answer
    x = 91,267.52

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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.