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Finding the Fourth Proportional to 99,547.80, 137,378.28 and 54,228.30

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Solution

The fourth proportional to 99,547.80, 137,378.28 and 54,228.30 is: 74,836.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,547.80 : 137,378.28 = 54,228.30 : x
  2. Step 2: Convert to fraction form
    99,547.80/137,378.28 = 54,228.30/x
  3. Step 3: Cross multiply
    99,547.80x = 137,378.28 × 54,228.30
  4. Step 4: Simplify right side
    99,547.80x = 7,449,790,581.32
  5. Step 5: Solve for x
    x = 7,449,790,581.32/99,547.80
  6. Step 6: Final answer
    x = 74,836.32

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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.