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Finding the Fourth Proportional to 72,946.01, 100,663.49 and 40,681.60

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Solution

The fourth proportional to 72,946.01, 100,663.49 and 40,681.60 is: 56,139.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,946.01 : 100,663.49 = 40,681.60 : x
  2. Step 2: Convert to fraction form
    72,946.01/100,663.49 = 40,681.60/x
  3. Step 3: Cross multiply
    72,946.01x = 100,663.49 × 40,681.60
  4. Step 4: Simplify right side
    72,946.01x = 4,095,151,684.83
  5. Step 5: Solve for x
    x = 4,095,151,684.83/72,946.01
  6. Step 6: Final answer
    x = 56,139.49

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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.