Home / 90,878.85-136,308.57-31,715.64

Finding the Fourth Proportional to 90,878.85, 136,308.57 and 31,715.64

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Solution

The fourth proportional to 90,878.85, 136,308.57 and 31,715.64 is: 47,570.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,878.85 : 136,308.57 = 31,715.64 : x
  2. Step 2: Convert to fraction form
    90,878.85/136,308.57 = 31,715.64/x
  3. Step 3: Cross multiply
    90,878.85x = 136,308.57 × 31,715.64
  4. Step 4: Simplify right side
    90,878.85x = 4,323,113,535.03
  5. Step 5: Solve for x
    x = 4,323,113,535.03/90,878.85
  6. Step 6: Final answer
    x = 47,570.07

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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.