Home / 85,988.41-129,154.50-51,862.40

Finding the Fourth Proportional to 85,988.41, 129,154.50 and 51,862.40

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Solution

The fourth proportional to 85,988.41, 129,154.50 and 51,862.40 is: 77,897.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,988.41 : 129,154.50 = 51,862.40 : x
  2. Step 2: Convert to fraction form
    85,988.41/129,154.50 = 51,862.40/x
  3. Step 3: Cross multiply
    85,988.41x = 129,154.50 × 51,862.40
  4. Step 4: Simplify right side
    85,988.41x = 6,698,262,340.80
  5. Step 5: Solve for x
    x = 6,698,262,340.80/85,988.41
  6. Step 6: Final answer
    x = 77,897.27

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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.