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Finding the Fourth Proportional to 86,222.40, 129,430.80 and 51,181.80

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Solution

The fourth proportional to 86,222.40, 129,430.80 and 51,181.80 is: 76,830.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,222.40 : 129,430.80 = 51,181.80 : x
  2. Step 2: Convert to fraction form
    86,222.40/129,430.80 = 51,181.80/x
  3. Step 3: Cross multiply
    86,222.40x = 129,430.80 × 51,181.80
  4. Step 4: Simplify right side
    86,222.40x = 6,624,501,319.44
  5. Step 5: Solve for x
    x = 6,624,501,319.44/86,222.40
  6. Step 6: Final answer
    x = 76,830.40

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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.