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Finding the Fourth Proportional to 86,798.40, 130,165.20 and 30,616.80

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Solution

The fourth proportional to 86,798.40, 130,165.20 and 30,616.80 is: 45,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,798.40 : 130,165.20 = 30,616.80 : x
  2. Step 2: Convert to fraction form
    86,798.40/130,165.20 = 30,616.80/x
  3. Step 3: Cross multiply
    86,798.40x = 130,165.20 × 30,616.80
  4. Step 4: Simplify right side
    86,798.40x = 3,985,241,895.36
  5. Step 5: Solve for x
    x = 3,985,241,895.36/86,798.40
  6. Step 6: Final answer
    x = 45,913.77

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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.