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Finding the Fourth Proportional to 72,065.40, 99,230.08 and 65,307.04

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Solution

The fourth proportional to 72,065.40, 99,230.08 and 65,307.04 is: 89,924.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,065.40 : 99,230.08 = 65,307.04 : x
  2. Step 2: Convert to fraction form
    72,065.40/99,230.08 = 65,307.04/x
  3. Step 3: Cross multiply
    72,065.40x = 99,230.08 × 65,307.04
  4. Step 4: Simplify right side
    72,065.40x = 6,480,422,803.76
  5. Step 5: Solve for x
    x = 6,480,422,803.76/72,065.40
  6. Step 6: Final answer
    x = 89,924.19

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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.