Home / 138,573.72-191,283.74-90,830.15

Finding the Fourth Proportional to 138,573.72, 191,283.74 and 90,830.15

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Solution

The fourth proportional to 138,573.72, 191,283.74 and 90,830.15 is: 125,379.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,573.72 : 191,283.74 = 90,830.15 : x
  2. Step 2: Convert to fraction form
    138,573.72/191,283.74 = 90,830.15/x
  3. Step 3: Cross multiply
    138,573.72x = 191,283.74 × 90,830.15
  4. Step 4: Simplify right side
    138,573.72x = 17,374,329,386.19
  5. Step 5: Solve for x
    x = 17,374,329,386.19/138,573.72
  6. Step 6: Final answer
    x = 125,379.69

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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.