Home / 138,203.76-190,718.88-77,774.40

Finding the Fourth Proportional to 138,203.76, 190,718.88 and 77,774.40

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Solution

The fourth proportional to 138,203.76, 190,718.88 and 77,774.40 is: 107,327.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,203.76 : 190,718.88 = 77,774.40 : x
  2. Step 2: Convert to fraction form
    138,203.76/190,718.88 = 77,774.40/x
  3. Step 3: Cross multiply
    138,203.76x = 190,718.88 × 77,774.40
  4. Step 4: Simplify right side
    138,203.76x = 14,833,046,460.67
  5. Step 5: Solve for x
    x = 14,833,046,460.67/138,203.76
  6. Step 6: Final answer
    x = 107,327.37

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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.