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Finding the Fourth Proportional to 64,703.55, 89,339.55 and 63,670.20

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Solution

The fourth proportional to 64,703.55, 89,339.55 and 63,670.20 is: 87,912.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,703.55 : 89,339.55 = 63,670.20 : x
  2. Step 2: Convert to fraction form
    64,703.55/89,339.55 = 63,670.20/x
  3. Step 3: Cross multiply
    64,703.55x = 89,339.55 × 63,670.20
  4. Step 4: Simplify right side
    64,703.55x = 5,688,267,016.41
  5. Step 5: Solve for x
    x = 5,688,267,016.41/64,703.55
  6. Step 6: Final answer
    x = 87,912.75

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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.