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Finding the Fourth Proportional to 86,547.70, 129,809.40 and 27,389.35

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Solution

The fourth proportional to 86,547.70, 129,809.40 and 27,389.35 is: 41,080.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,547.70 : 129,809.40 = 27,389.35 : x
  2. Step 2: Convert to fraction form
    86,547.70/129,809.40 = 27,389.35/x
  3. Step 3: Cross multiply
    86,547.70x = 129,809.40 × 27,389.35
  4. Step 4: Simplify right side
    86,547.70x = 3,555,395,089.89
  5. Step 5: Solve for x
    x = 3,555,395,089.89/86,547.70
  6. Step 6: Final answer
    x = 41,080.18

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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.