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Finding the Fourth Proportional to 72,607.79, 100,155.29 and 45,703.60

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Solution

The fourth proportional to 72,607.79, 100,155.29 and 45,703.60 is: 63,043.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,607.79 : 100,155.29 = 45,703.60 : x
  2. Step 2: Convert to fraction form
    72,607.79/100,155.29 = 45,703.60/x
  3. Step 3: Cross multiply
    72,607.79x = 100,155.29 × 45,703.60
  4. Step 4: Simplify right side
    72,607.79x = 4,577,456,833.14
  5. Step 5: Solve for x
    x = 4,577,456,833.14/72,607.79
  6. Step 6: Final answer
    x = 63,043.60

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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.