Home / 78,886.31-108,861.57-43,075.40

Finding the Fourth Proportional to 78,886.31, 108,861.57 and 43,075.40

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Solution

The fourth proportional to 78,886.31, 108,861.57 and 43,075.40 is: 59,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.31 : 108,861.57 = 43,075.40 : x
  2. Step 2: Convert to fraction form
    78,886.31/108,861.57 = 43,075.40/x
  3. Step 3: Cross multiply
    78,886.31x = 108,861.57 × 43,075.40
  4. Step 4: Simplify right side
    78,886.31x = 4,689,255,128.07
  5. Step 5: Solve for x
    x = 4,689,255,128.07/78,886.31
  6. Step 6: Final answer
    x = 59,443.21

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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.