Home / 85,642.90-128,453.01-38,885.02

Finding the Fourth Proportional to 85,642.90, 128,453.01 and 38,885.02

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Solution

The fourth proportional to 85,642.90, 128,453.01 and 38,885.02 is: 58,322.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,642.90 : 128,453.01 = 38,885.02 : x
  2. Step 2: Convert to fraction form
    85,642.90/128,453.01 = 38,885.02/x
  3. Step 3: Cross multiply
    85,642.90x = 128,453.01 × 38,885.02
  4. Step 4: Simplify right side
    85,642.90x = 4,994,897,862.91
  5. Step 5: Solve for x
    x = 4,994,897,862.91/85,642.90
  6. Step 6: Final answer
    x = 58,322.38

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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.