Home / 138,207.96-190,730.66-77,780.76

Finding the Fourth Proportional to 138,207.96, 190,730.66 and 77,780.76

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Solution

The fourth proportional to 138,207.96, 190,730.66 and 77,780.76 is: 107,339.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,207.96 : 190,730.66 = 77,780.76 : x
  2. Step 2: Convert to fraction form
    138,207.96/190,730.66 = 77,780.76/x
  3. Step 3: Cross multiply
    138,207.96x = 190,730.66 × 77,780.76
  4. Step 4: Simplify right side
    138,207.96x = 14,835,175,690.10
  5. Step 5: Solve for x
    x = 14,835,175,690.10/138,207.96
  6. Step 6: Final answer
    x = 107,339.52

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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.