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Finding the Fourth Proportional to 86,710.40, 130,012.80 and 34,056.80

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Solution

The fourth proportional to 86,710.40, 130,012.80 and 34,056.80 is: 51,064.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,710.40 : 130,012.80 = 34,056.80 : x
  2. Step 2: Convert to fraction form
    86,710.40/130,012.80 = 34,056.80/x
  3. Step 3: Cross multiply
    86,710.40x = 130,012.80 × 34,056.80
  4. Step 4: Simplify right side
    86,710.40x = 4,427,819,927.04
  5. Step 5: Solve for x
    x = 4,427,819,927.04/86,710.40
  6. Step 6: Final answer
    x = 51,064.46

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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.