Home / 90,447.49-124,702.83-64,636.87

Finding the Fourth Proportional to 90,447.49, 124,702.83 and 64,636.87

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Solution

The fourth proportional to 90,447.49, 124,702.83 and 64,636.87 is: 89,116.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,447.49 : 124,702.83 = 64,636.87 : x
  2. Step 2: Convert to fraction form
    90,447.49/124,702.83 = 64,636.87/x
  3. Step 3: Cross multiply
    90,447.49x = 124,702.83 × 64,636.87
  4. Step 4: Simplify right side
    90,447.49x = 8,060,400,369.51
  5. Step 5: Solve for x
    x = 8,060,400,369.51/90,447.49
  6. Step 6: Final answer
    x = 89,116.91

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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.