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Finding the Fourth Proportional to 64,878.40, 89,532.84 and 38,036.80

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Solution

The fourth proportional to 64,878.40, 89,532.84 and 38,036.80 is: 52,491.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,878.40 : 89,532.84 = 38,036.80 : x
  2. Step 2: Convert to fraction form
    64,878.40/89,532.84 = 38,036.80/x
  3. Step 3: Cross multiply
    64,878.40x = 89,532.84 × 38,036.80
  4. Step 4: Simplify right side
    64,878.40x = 3,405,542,728.51
  5. Step 5: Solve for x
    x = 3,405,542,728.51/64,878.40
  6. Step 6: Final answer
    x = 52,491.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.