Home / 209,075.79-288,525.74-128,555.91

Finding the Fourth Proportional to 209,075.79, 288,525.74 and 128,555.91

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Solution

The fourth proportional to 209,075.79, 288,525.74 and 128,555.91 is: 177,407.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,075.79 : 288,525.74 = 128,555.91 : x
  2. Step 2: Convert to fraction form
    209,075.79/288,525.74 = 128,555.91/x
  3. Step 3: Cross multiply
    209,075.79x = 288,525.74 × 128,555.91
  4. Step 4: Simplify right side
    209,075.79x = 37,091,689,064.12
  5. Step 5: Solve for x
    x = 37,091,689,064.12/209,075.79
  6. Step 6: Final answer
    x = 177,407.86

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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.