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Finding the Fourth Proportional to 70,398.68, 105,598.38 and 17,808.21

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Solution

The fourth proportional to 70,398.68, 105,598.38 and 17,808.21 is: 26,712.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,398.68 : 105,598.38 = 17,808.21 : x
  2. Step 2: Convert to fraction form
    70,398.68/105,598.38 = 17,808.21/x
  3. Step 3: Cross multiply
    70,398.68x = 105,598.38 × 17,808.21
  4. Step 4: Simplify right side
    70,398.68x = 1,880,518,126.70
  5. Step 5: Solve for x
    x = 1,880,518,126.70/70,398.68
  6. Step 6: Final answer
    x = 26,712.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.