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Finding the Fourth Proportional to 72,897.60, 109,054.80 and 63,145.20

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Solution

The fourth proportional to 72,897.60, 109,054.80 and 63,145.20 is: 94,465.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,897.60 : 109,054.80 = 63,145.20 : x
  2. Step 2: Convert to fraction form
    72,897.60/109,054.80 = 63,145.20/x
  3. Step 3: Cross multiply
    72,897.60x = 109,054.80 × 63,145.20
  4. Step 4: Simplify right side
    72,897.60x = 6,886,287,156.96
  5. Step 5: Solve for x
    x = 6,886,287,156.96/72,897.60
  6. Step 6: Final answer
    x = 94,465.21

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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.