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Finding the Fourth Proportional to 92,990.63, 128,275.45 and 60,679.53

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Solution

The fourth proportional to 92,990.63, 128,275.45 and 60,679.53 is: 83,704.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,990.63 : 128,275.45 = 60,679.53 : x
  2. Step 2: Convert to fraction form
    92,990.63/128,275.45 = 60,679.53/x
  3. Step 3: Cross multiply
    92,990.63x = 128,275.45 × 60,679.53
  4. Step 4: Simplify right side
    92,990.63x = 7,783,693,864.84
  5. Step 5: Solve for x
    x = 7,783,693,864.84/92,990.63
  6. Step 6: Final answer
    x = 83,704.06

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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.