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Finding the Fourth Proportional to 86,526.90, 129,848.40 and 30,366.90

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Solution

The fourth proportional to 86,526.90, 129,848.40 and 30,366.90 is: 45,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,526.90 : 129,848.40 = 30,366.90 : x
  2. Step 2: Convert to fraction form
    86,526.90/129,848.40 = 30,366.90/x
  3. Step 3: Cross multiply
    86,526.90x = 129,848.40 × 30,366.90
  4. Step 4: Simplify right side
    86,526.90x = 3,943,093,377.96
  5. Step 5: Solve for x
    x = 3,943,093,377.96/86,526.90
  6. Step 6: Final answer
    x = 45,570.72

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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.