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Finding the Fourth Proportional to 68,715.48, 103,073.70 and 21,970.20

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Solution

The fourth proportional to 68,715.48, 103,073.70 and 21,970.20 is: 32,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.48 : 103,073.70 = 21,970.20 : x
  2. Step 2: Convert to fraction form
    68,715.48/103,073.70 = 21,970.20/x
  3. Step 3: Cross multiply
    68,715.48x = 103,073.70 × 21,970.20
  4. Step 4: Simplify right side
    68,715.48x = 2,264,549,803.74
  5. Step 5: Solve for x
    x = 2,264,549,803.74/68,715.48
  6. Step 6: Final answer
    x = 32,955.45

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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.