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Finding the Fourth Proportional to 100,152.80, 138,210.90 and 54,833.66

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Solution

The fourth proportional to 100,152.80, 138,210.90 and 54,833.66 is: 75,670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,152.80 : 138,210.90 = 54,833.66 : x
  2. Step 2: Convert to fraction form
    100,152.80/138,210.90 = 54,833.66/x
  3. Step 3: Cross multiply
    100,152.80x = 138,210.90 × 54,833.66
  4. Step 4: Simplify right side
    100,152.80x = 7,578,610,206.38
  5. Step 5: Solve for x
    x = 7,578,610,206.38/100,152.80
  6. Step 6: Final answer
    x = 75,670.47

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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.