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Finding the Fourth Proportional to 92,978.17, 128,312.58 and 52,690.59

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Solution

The fourth proportional to 92,978.17, 128,312.58 and 52,690.59 is: 72,714.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.17 : 128,312.58 = 52,690.59 : x
  2. Step 2: Convert to fraction form
    92,978.17/128,312.58 = 52,690.59/x
  3. Step 3: Cross multiply
    92,978.17x = 128,312.58 × 52,690.59
  4. Step 4: Simplify right side
    92,978.17x = 6,760,865,544.62
  5. Step 5: Solve for x
    x = 6,760,865,544.62/92,978.17
  6. Step 6: Final answer
    x = 72,714.55

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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.