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Finding the Fourth Proportional to 128,029.98, 176,702.94 and 74,359.92

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Solution

The fourth proportional to 128,029.98, 176,702.94 and 74,359.92 is: 102,629.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.98 : 176,702.94 = 74,359.92 : x
  2. Step 2: Convert to fraction form
    128,029.98/176,702.94 = 74,359.92/x
  3. Step 3: Cross multiply
    128,029.98x = 176,702.94 × 74,359.92
  4. Step 4: Simplify right side
    128,029.98x = 13,139,616,482.16
  5. Step 5: Solve for x
    x = 13,139,616,482.16/128,029.98
  6. Step 6: Final answer
    x = 102,629.22

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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.