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Finding the Fourth Proportional to 100,303.25, 138,417.93 and 54,983.16

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Solution

The fourth proportional to 100,303.25, 138,417.93 and 54,983.16 is: 75,876.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,303.25 : 138,417.93 = 54,983.16 : x
  2. Step 2: Convert to fraction form
    100,303.25/138,417.93 = 54,983.16/x
  3. Step 3: Cross multiply
    100,303.25x = 138,417.93 × 54,983.16
  4. Step 4: Simplify right side
    100,303.25x = 7,610,655,192.06
  5. Step 5: Solve for x
    x = 7,610,655,192.06/100,303.25
  6. Step 6: Final answer
    x = 75,876.46

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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.