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Finding the Fourth Proportional to 85,547.60, 128,175.60 and 73,008.80

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Solution

The fourth proportional to 85,547.60, 128,175.60 and 73,008.80 is: 109,388.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,547.60 : 128,175.60 = 73,008.80 : x
  2. Step 2: Convert to fraction form
    85,547.60/128,175.60 = 73,008.80/x
  3. Step 3: Cross multiply
    85,547.60x = 128,175.60 × 73,008.80
  4. Step 4: Simplify right side
    85,547.60x = 9,357,946,745.28
  5. Step 5: Solve for x
    x = 9,357,946,745.28/85,547.60
  6. Step 6: Final answer
    x = 109,388.77

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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.