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Finding the Fourth Proportional to 59,780.40, 89,573.40 and 51,421.20

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Solution

The fourth proportional to 59,780.40, 89,573.40 and 51,421.20 is: 77,048.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,780.40 : 89,573.40 = 51,421.20 : x
  2. Step 2: Convert to fraction form
    59,780.40/89,573.40 = 51,421.20/x
  3. Step 3: Cross multiply
    59,780.40x = 89,573.40 × 51,421.20
  4. Step 4: Simplify right side
    59,780.40x = 4,605,971,716.08
  5. Step 5: Solve for x
    x = 4,605,971,716.08/59,780.40
  6. Step 6: Final answer
    x = 77,048.19

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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.