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Finding the Fourth Proportional to 75,210.80, 112,859.40 and 28,497.20

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Solution

The fourth proportional to 75,210.80, 112,859.40 and 28,497.20 is: 42,762.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,210.80 : 112,859.40 = 28,497.20 : x
  2. Step 2: Convert to fraction form
    75,210.80/112,859.40 = 28,497.20/x
  3. Step 3: Cross multiply
    75,210.80x = 112,859.40 × 28,497.20
  4. Step 4: Simplify right side
    75,210.80x = 3,216,176,893.68
  5. Step 5: Solve for x
    x = 3,216,176,893.68/75,210.80
  6. Step 6: Final answer
    x = 42,762.17

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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.