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Finding the Fourth Proportional to 85,018.80, 127,528.20 and 69,985.20

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Solution

The fourth proportional to 85,018.80, 127,528.20 and 69,985.20 is: 104,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,018.80 : 127,528.20 = 69,985.20 : x
  2. Step 2: Convert to fraction form
    85,018.80/127,528.20 = 69,985.20/x
  3. Step 3: Cross multiply
    85,018.80x = 127,528.20 × 69,985.20
  4. Step 4: Simplify right side
    85,018.80x = 8,925,086,582.64
  5. Step 5: Solve for x
    x = 8,925,086,582.64/85,018.80
  6. Step 6: Final answer
    x = 104,977.80

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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.