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Finding the Fourth Proportional to 52,970.40, 79,429.95 and 30,790.17

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Solution

The fourth proportional to 52,970.40, 79,429.95 and 30,790.17 is: 46,170.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,970.40 : 79,429.95 = 30,790.17 : x
  2. Step 2: Convert to fraction form
    52,970.40/79,429.95 = 30,790.17/x
  3. Step 3: Cross multiply
    52,970.40x = 79,429.95 × 30,790.17
  4. Step 4: Simplify right side
    52,970.40x = 2,445,661,663.59
  5. Step 5: Solve for x
    x = 2,445,661,663.59/52,970.40
  6. Step 6: Final answer
    x = 46,170.35

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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.