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Finding the Fourth Proportional to 100,085.52, 138,117.95 and 54,763.80

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Solution

The fourth proportional to 100,085.52, 138,117.95 and 54,763.80 is: 75,574.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,085.52 : 138,117.95 = 54,763.80 : x
  2. Step 2: Convert to fraction form
    100,085.52/138,117.95 = 54,763.80/x
  3. Step 3: Cross multiply
    100,085.52x = 138,117.95 × 54,763.80
  4. Step 4: Simplify right side
    100,085.52x = 7,563,863,516.39
  5. Step 5: Solve for x
    x = 7,563,863,516.39/100,085.52
  6. Step 6: Final answer
    x = 75,574.00

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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.