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Finding the Fourth Proportional to 72,897.45, 109,346.13 and 56,281.74

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Solution

The fourth proportional to 72,897.45, 109,346.13 and 56,281.74 is: 84,422.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,897.45 : 109,346.13 = 56,281.74 : x
  2. Step 2: Convert to fraction form
    72,897.45/109,346.13 = 56,281.74/x
  3. Step 3: Cross multiply
    72,897.45x = 109,346.13 × 56,281.74
  4. Step 4: Simplify right side
    72,897.45x = 6,154,190,458.67
  5. Step 5: Solve for x
    x = 6,154,190,458.67/72,897.45
  6. Step 6: Final answer
    x = 84,422.58

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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.