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Finding the Fourth Proportional to 64,987.04, 89,688.15 and 39,487.54

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Solution

The fourth proportional to 64,987.04, 89,688.15 and 39,487.54 is: 54,496.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,987.04 : 89,688.15 = 39,487.54 : x
  2. Step 2: Convert to fraction form
    64,987.04/89,688.15 = 39,487.54/x
  3. Step 3: Cross multiply
    64,987.04x = 89,688.15 × 39,487.54
  4. Step 4: Simplify right side
    64,987.04x = 3,541,564,410.65
  5. Step 5: Solve for x
    x = 3,541,564,410.65/64,987.04
  6. Step 6: Final answer
    x = 54,496.47

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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.