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Finding the Fourth Proportional to 65,700.59, 98,530.29 and 21,318.12

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Solution

The fourth proportional to 65,700.59, 98,530.29 and 21,318.12 is: 31,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,700.59 : 98,530.29 = 21,318.12 : x
  2. Step 2: Convert to fraction form
    65,700.59/98,530.29 = 21,318.12/x
  3. Step 3: Cross multiply
    65,700.59x = 98,530.29 × 21,318.12
  4. Step 4: Simplify right side
    65,700.59x = 2,100,480,545.85
  5. Step 5: Solve for x
    x = 2,100,480,545.85/65,700.59
  6. Step 6: Final answer
    x = 31,970.50

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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.