Home / 78,685.36-108,589.08-42,877.36

Finding the Fourth Proportional to 78,685.36, 108,589.08 and 42,877.36

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Solution

The fourth proportional to 78,685.36, 108,589.08 and 42,877.36 is: 59,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.36 : 108,589.08 = 42,877.36 : x
  2. Step 2: Convert to fraction form
    78,685.36/108,589.08 = 42,877.36/x
  3. Step 3: Cross multiply
    78,685.36x = 108,589.08 × 42,877.36
  4. Step 4: Simplify right side
    78,685.36x = 4,656,013,075.23
  5. Step 5: Solve for x
    x = 4,656,013,075.23/78,685.36
  6. Step 6: Final answer
    x = 59,172.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.