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Finding the Fourth Proportional to 143,393.60, 215,128.80 and 127,918.40

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Solution

The fourth proportional to 143,393.60, 215,128.80 and 127,918.40 is: 191,911.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,393.60 : 215,128.80 = 127,918.40 : x
  2. Step 2: Convert to fraction form
    143,393.60/215,128.80 = 127,918.40/x
  3. Step 3: Cross multiply
    143,393.60x = 215,128.80 × 127,918.40
  4. Step 4: Simplify right side
    143,393.60x = 27,518,931,889.92
  5. Step 5: Solve for x
    x = 27,518,931,889.92/143,393.60
  6. Step 6: Final answer
    x = 191,911.86

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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.