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Finding the Fourth Proportional to 86,552.50, 129,828.75 and 20,888.50

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Solution

The fourth proportional to 86,552.50, 129,828.75 and 20,888.50 is: 31,332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,552.50 : 129,828.75 = 20,888.50 : x
  2. Step 2: Convert to fraction form
    86,552.50/129,828.75 = 20,888.50/x
  3. Step 3: Cross multiply
    86,552.50x = 129,828.75 × 20,888.50
  4. Step 4: Simplify right side
    86,552.50x = 2,711,927,844.38
  5. Step 5: Solve for x
    x = 2,711,927,844.38/86,552.50
  6. Step 6: Final answer
    x = 31,332.75

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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.