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Finding the Fourth Proportional to 59,881.60, 89,830.40 and 20,428.80

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Solution

The fourth proportional to 59,881.60, 89,830.40 and 20,428.80 is: 30,645.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,881.60 : 89,830.40 = 20,428.80 : x
  2. Step 2: Convert to fraction form
    59,881.60/89,830.40 = 20,428.80/x
  3. Step 3: Cross multiply
    59,881.60x = 89,830.40 × 20,428.80
  4. Step 4: Simplify right side
    59,881.60x = 1,835,127,275.52
  5. Step 5: Solve for x
    x = 1,835,127,275.52/59,881.60
  6. Step 6: Final answer
    x = 30,645.93

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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.