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Finding the Fourth Proportional to 86,246.40, 129,369.60 and 65,510.40

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Solution

The fourth proportional to 86,246.40, 129,369.60 and 65,510.40 is: 98,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,246.40 : 129,369.60 = 65,510.40 : x
  2. Step 2: Convert to fraction form
    86,246.40/129,369.60 = 65,510.40/x
  3. Step 3: Cross multiply
    86,246.40x = 129,369.60 × 65,510.40
  4. Step 4: Simplify right side
    86,246.40x = 8,475,054,243.84
  5. Step 5: Solve for x
    x = 8,475,054,243.84/86,246.40
  6. Step 6: Final answer
    x = 98,265.60

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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.