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Finding the Fourth Proportional to 99,630.40, 137,485.80 and 54,307.39

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Solution

The fourth proportional to 99,630.40, 137,485.80 and 54,307.39 is: 74,941.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,630.40 : 137,485.80 = 54,307.39 : x
  2. Step 2: Convert to fraction form
    99,630.40/137,485.80 = 54,307.39/x
  3. Step 3: Cross multiply
    99,630.40x = 137,485.80 × 54,307.39
  4. Step 4: Simplify right side
    99,630.40x = 7,466,494,960.06
  5. Step 5: Solve for x
    x = 7,466,494,960.06/99,630.40
  6. Step 6: Final answer
    x = 74,941.93

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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.