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Finding the Fourth Proportional to 92,987.40, 128,321.10 and 50,547

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Solution

The fourth proportional to 92,987.40, 128,321.10 and 50,547 is: 69,754.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,987.40 : 128,321.10 = 50,547 : x
  2. Step 2: Convert to fraction form
    92,987.40/128,321.10 = 50,547/x
  3. Step 3: Cross multiply
    92,987.40x = 128,321.10 × 50,547
  4. Step 4: Simplify right side
    92,987.40x = 6,486,246,641.70
  5. Step 5: Solve for x
    x = 6,486,246,641.70/92,987.40
  6. Step 6: Final answer
    x = 69,754.04

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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.