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Finding the Fourth Proportional to 70,885.80, 106,328.70 and 61,036.20

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Solution

The fourth proportional to 70,885.80, 106,328.70 and 61,036.20 is: 91,554.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,885.80 : 106,328.70 = 61,036.20 : x
  2. Step 2: Convert to fraction form
    70,885.80/106,328.70 = 61,036.20/x
  3. Step 3: Cross multiply
    70,885.80x = 106,328.70 × 61,036.20
  4. Step 4: Simplify right side
    70,885.80x = 6,489,899,798.94
  5. Step 5: Solve for x
    x = 6,489,899,798.94/70,885.80
  6. Step 6: Final answer
    x = 91,554.30

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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.