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Finding the Fourth Proportional to 64,700.32, 97,018.08 and 20,326.50

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Solution

The fourth proportional to 64,700.32, 97,018.08 and 20,326.50 is: 30,479.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,700.32 : 97,018.08 = 20,326.50 : x
  2. Step 2: Convert to fraction form
    64,700.32/97,018.08 = 20,326.50/x
  3. Step 3: Cross multiply
    64,700.32x = 97,018.08 × 20,326.50
  4. Step 4: Simplify right side
    64,700.32x = 1,972,038,003.12
  5. Step 5: Solve for x
    x = 1,972,038,003.12/64,700.32
  6. Step 6: Final answer
    x = 30,479.57

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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.