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Finding the Fourth Proportional to 64,689.76, 97,038.72 and 20,318.32

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Solution

The fourth proportional to 64,689.76, 97,038.72 and 20,318.32 is: 30,478.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,689.76 : 97,038.72 = 20,318.32 : x
  2. Step 2: Convert to fraction form
    64,689.76/97,038.72 = 20,318.32/x
  3. Step 3: Cross multiply
    64,689.76x = 97,038.72 × 20,318.32
  4. Step 4: Simplify right side
    64,689.76x = 1,971,663,765.35
  5. Step 5: Solve for x
    x = 1,971,663,765.35/64,689.76
  6. Step 6: Final answer
    x = 30,478.76

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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.