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Finding the Fourth Proportional to 140,172.80, 210,259.20 and 66,444.80

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Solution

The fourth proportional to 140,172.80, 210,259.20 and 66,444.80 is: 99,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,172.80 : 210,259.20 = 66,444.80 : x
  2. Step 2: Convert to fraction form
    140,172.80/210,259.20 = 66,444.80/x
  3. Step 3: Cross multiply
    140,172.80x = 210,259.20 × 66,444.80
  4. Step 4: Simplify right side
    140,172.80x = 13,970,630,492.16
  5. Step 5: Solve for x
    x = 13,970,630,492.16/140,172.80
  6. Step 6: Final answer
    x = 99,667.20

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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.