Home / 287,738.64-431,839.08-129,980.88

Finding the Fourth Proportional to 287,738.64, 431,839.08 and 129,980.88

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Solution

The fourth proportional to 287,738.64, 431,839.08 and 129,980.88 is: 195,075.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,738.64 : 431,839.08 = 129,980.88 : x
  2. Step 2: Convert to fraction form
    287,738.64/431,839.08 = 129,980.88/x
  3. Step 3: Cross multiply
    287,738.64x = 431,839.08 × 129,980.88
  4. Step 4: Simplify right side
    287,738.64x = 56,130,823,636.79
  5. Step 5: Solve for x
    x = 56,130,823,636.79/287,738.64
  6. Step 6: Final answer
    x = 195,075.72

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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.