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Finding the Fourth Proportional to 85,091.80, 127,686.30 and 58,815.40

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Solution

The fourth proportional to 85,091.80, 127,686.30 and 58,815.40 is: 88,256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,091.80 : 127,686.30 = 58,815.40 : x
  2. Step 2: Convert to fraction form
    85,091.80/127,686.30 = 58,815.40/x
  3. Step 3: Cross multiply
    85,091.80x = 127,686.30 × 58,815.40
  4. Step 4: Simplify right side
    85,091.80x = 7,509,920,809.02
  5. Step 5: Solve for x
    x = 7,509,920,809.02/85,091.80
  6. Step 6: Final answer
    x = 88,256.69

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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.