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Finding the Fourth Proportional to 72,030.64, 108,045.96 and 19,440.12

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Solution

The fourth proportional to 72,030.64, 108,045.96 and 19,440.12 is: 29,160.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,030.64 : 108,045.96 = 19,440.12 : x
  2. Step 2: Convert to fraction form
    72,030.64/108,045.96 = 19,440.12/x
  3. Step 3: Cross multiply
    72,030.64x = 108,045.96 × 19,440.12
  4. Step 4: Simplify right side
    72,030.64x = 2,100,426,427.92
  5. Step 5: Solve for x
    x = 2,100,426,427.92/72,030.64
  6. Step 6: Final answer
    x = 29,160.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.