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Finding the Fourth Proportional to 90,509.90, 124,909.53 and 50,223.77

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Solution

The fourth proportional to 90,509.90, 124,909.53 and 50,223.77 is: 69,312.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,509.90 : 124,909.53 = 50,223.77 : x
  2. Step 2: Convert to fraction form
    90,509.90/124,909.53 = 50,223.77/x
  3. Step 3: Cross multiply
    90,509.90x = 124,909.53 × 50,223.77
  4. Step 4: Simplify right side
    90,509.90x = 6,273,427,505.53
  5. Step 5: Solve for x
    x = 6,273,427,505.53/90,509.90
  6. Step 6: Final answer
    x = 69,312.06

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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.