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Finding the Fourth Proportional to 85,487.40, 128,231.10 and 22,307.40

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Solution

The fourth proportional to 85,487.40, 128,231.10 and 22,307.40 is: 33,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.40 : 128,231.10 = 22,307.40 : x
  2. Step 2: Convert to fraction form
    85,487.40/128,231.10 = 22,307.40/x
  3. Step 3: Cross multiply
    85,487.40x = 128,231.10 × 22,307.40
  4. Step 4: Simplify right side
    85,487.40x = 2,860,502,440.14
  5. Step 5: Solve for x
    x = 2,860,502,440.14/85,487.40
  6. Step 6: Final answer
    x = 33,461.10

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Similar ratio
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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.