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Finding the Fourth Proportional to 86,886.40, 130,110.90 and 57,143.20

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Solution

The fourth proportional to 86,886.40, 130,110.90 and 57,143.20 is: 85,570.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,886.40 : 130,110.90 = 57,143.20 : x
  2. Step 2: Convert to fraction form
    86,886.40/130,110.90 = 57,143.20/x
  3. Step 3: Cross multiply
    86,886.40x = 130,110.90 × 57,143.20
  4. Step 4: Simplify right side
    86,886.40x = 7,434,953,180.88
  5. Step 5: Solve for x
    x = 7,434,953,180.88/86,886.40
  6. Step 6: Final answer
    x = 85,570.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.