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Finding the Fourth Proportional to 92,759.76, 128,075.04 and 56,997.72

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Solution

The fourth proportional to 92,759.76, 128,075.04 and 56,997.72 is: 78,697.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,759.76 : 128,075.04 = 56,997.72 : x
  2. Step 2: Convert to fraction form
    92,759.76/128,075.04 = 56,997.72/x
  3. Step 3: Cross multiply
    92,759.76x = 128,075.04 × 56,997.72
  4. Step 4: Simplify right side
    92,759.76x = 7,299,985,268.91
  5. Step 5: Solve for x
    x = 7,299,985,268.91/92,759.76
  6. Step 6: Final answer
    x = 78,697.76

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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.