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Finding the Fourth Proportional to 90,384.58, 124,702.20 and 52,138.98

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Solution

The fourth proportional to 90,384.58, 124,702.20 and 52,138.98 is: 71,935.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,384.58 : 124,702.20 = 52,138.98 : x
  2. Step 2: Convert to fraction form
    90,384.58/124,702.20 = 52,138.98/x
  3. Step 3: Cross multiply
    90,384.58x = 124,702.20 × 52,138.98
  4. Step 4: Simplify right side
    90,384.58x = 6,501,845,511.76
  5. Step 5: Solve for x
    x = 6,501,845,511.76/90,384.58
  6. Step 6: Final answer
    x = 71,935.34

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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.