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Finding the Fourth Proportional to 86,802.30, 130,202.51 and 65,870.89

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Solution

The fourth proportional to 86,802.30, 130,202.51 and 65,870.89 is: 98,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,802.30 : 130,202.51 = 65,870.89 : x
  2. Step 2: Convert to fraction form
    86,802.30/130,202.51 = 65,870.89/x
  3. Step 3: Cross multiply
    86,802.30x = 130,202.51 × 65,870.89
  4. Step 4: Simplify right side
    86,802.30x = 8,576,554,559.07
  5. Step 5: Solve for x
    x = 8,576,554,559.07/86,802.30
  6. Step 6: Final answer
    x = 98,805.61

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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.