Home / 92,848.80-128,000.43-65,981.51

Finding the Fourth Proportional to 92,848.80, 128,000.43 and 65,981.51

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Solution

The fourth proportional to 92,848.80, 128,000.43 and 65,981.51 is: 90,961.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,848.80 : 128,000.43 = 65,981.51 : x
  2. Step 2: Convert to fraction form
    92,848.80/128,000.43 = 65,981.51/x
  3. Step 3: Cross multiply
    92,848.80x = 128,000.43 × 65,981.51
  4. Step 4: Simplify right side
    92,848.80x = 8,445,661,012.05
  5. Step 5: Solve for x
    x = 8,445,661,012.05/92,848.80
  6. Step 6: Final answer
    x = 90,961.44

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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.