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Finding the Fourth Proportional to 85,848.80, 128,773.20 and 73,164.20

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Solution

The fourth proportional to 85,848.80, 128,773.20 and 73,164.20 is: 109,746.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,848.80 : 128,773.20 = 73,164.20 : x
  2. Step 2: Convert to fraction form
    85,848.80/128,773.20 = 73,164.20/x
  3. Step 3: Cross multiply
    85,848.80x = 128,773.20 × 73,164.20
  4. Step 4: Simplify right side
    85,848.80x = 9,421,588,159.44
  5. Step 5: Solve for x
    x = 9,421,588,159.44/85,848.80
  6. Step 6: Final answer
    x = 109,746.30

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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.