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Finding the Fourth Proportional to 72,172.77, 99,598.54 and 40,341.64

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Solution

The fourth proportional to 72,172.77, 99,598.54 and 40,341.64 is: 55,671.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,172.77 : 99,598.54 = 40,341.64 : x
  2. Step 2: Convert to fraction form
    72,172.77/99,598.54 = 40,341.64/x
  3. Step 3: Cross multiply
    72,172.77x = 99,598.54 × 40,341.64
  4. Step 4: Simplify right side
    72,172.77x = 4,017,968,445.21
  5. Step 5: Solve for x
    x = 4,017,968,445.21/72,172.77
  6. Step 6: Final answer
    x = 55,671.53

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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.