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Finding the Fourth Proportional to 72,758.53, 100,420.55 and 45,547.28

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Solution

The fourth proportional to 72,758.53, 100,420.55 and 45,547.28 is: 62,863.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,758.53 : 100,420.55 = 45,547.28 : x
  2. Step 2: Convert to fraction form
    72,758.53/100,420.55 = 45,547.28/x
  3. Step 3: Cross multiply
    72,758.53x = 100,420.55 × 45,547.28
  4. Step 4: Simplify right side
    72,758.53x = 4,573,882,908.60
  5. Step 5: Solve for x
    x = 4,573,882,908.60/72,758.53
  6. Step 6: Final answer
    x = 62,863.87

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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.