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Finding the Fourth Proportional to 52,820.64, 79,235.28 and 21,656.16

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Solution

The fourth proportional to 52,820.64, 79,235.28 and 21,656.16 is: 32,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,820.64 : 79,235.28 = 21,656.16 : x
  2. Step 2: Convert to fraction form
    52,820.64/79,235.28 = 21,656.16/x
  3. Step 3: Cross multiply
    52,820.64x = 79,235.28 × 21,656.16
  4. Step 4: Simplify right side
    52,820.64x = 1,715,931,901.32
  5. Step 5: Solve for x
    x = 1,715,931,901.32/52,820.64
  6. Step 6: Final answer
    x = 32,486.01

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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.