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Finding the Fourth Proportional to 61,970.80, 92,956.20 and 20,412.40

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Solution

The fourth proportional to 61,970.80, 92,956.20 and 20,412.40 is: 30,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,970.80 : 92,956.20 = 20,412.40 : x
  2. Step 2: Convert to fraction form
    61,970.80/92,956.20 = 20,412.40/x
  3. Step 3: Cross multiply
    61,970.80x = 92,956.20 × 20,412.40
  4. Step 4: Simplify right side
    61,970.80x = 1,897,459,136.88
  5. Step 5: Solve for x
    x = 1,897,459,136.88/61,970.80
  6. Step 6: Final answer
    x = 30,618.60

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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.