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Finding the Fourth Proportional to 72,897.80, 109,389.90 and 48,009.20

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Solution

The fourth proportional to 72,897.80, 109,389.90 and 48,009.20 is: 72,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,897.80 : 109,389.90 = 48,009.20 : x
  2. Step 2: Convert to fraction form
    72,897.80/109,389.90 = 48,009.20/x
  3. Step 3: Cross multiply
    72,897.80x = 109,389.90 × 48,009.20
  4. Step 4: Simplify right side
    72,897.80x = 5,251,721,587.08
  5. Step 5: Solve for x
    x = 5,251,721,587.08/72,897.80
  6. Step 6: Final answer
    x = 72,042.25

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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.