Home / 78,075.14-117,088.50-28,148.78

Finding the Fourth Proportional to 78,075.14, 117,088.50 and 28,148.78

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Solution

The fourth proportional to 78,075.14, 117,088.50 and 28,148.78 is: 42,214.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,075.14 : 117,088.50 = 28,148.78 : x
  2. Step 2: Convert to fraction form
    78,075.14/117,088.50 = 28,148.78/x
  3. Step 3: Cross multiply
    78,075.14x = 117,088.50 × 28,148.78
  4. Step 4: Simplify right side
    78,075.14x = 3,295,897,841.59
  5. Step 5: Solve for x
    x = 3,295,897,841.59/78,075.14
  6. Step 6: Final answer
    x = 42,214.44

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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.