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Finding the Fourth Proportional to 92,877.62, 128,113.09 and 77,315.58

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Solution

The fourth proportional to 92,877.62, 128,113.09 and 77,315.58 is: 106,647.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,877.62 : 128,113.09 = 77,315.58 : x
  2. Step 2: Convert to fraction form
    92,877.62/128,113.09 = 77,315.58/x
  3. Step 3: Cross multiply
    92,877.62x = 128,113.09 × 77,315.58
  4. Step 4: Simplify right side
    92,877.62x = 9,905,137,560.08
  5. Step 5: Solve for x
    x = 9,905,137,560.08/92,877.62
  6. Step 6: Final answer
    x = 106,647.20

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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.