Home / 145,981.20-218,820.60-79,280.40

Finding the Fourth Proportional to 145,981.20, 218,820.60 and 79,280.40

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Solution

The fourth proportional to 145,981.20, 218,820.60 and 79,280.40 is: 118,838.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,981.20 : 218,820.60 = 79,280.40 : x
  2. Step 2: Convert to fraction form
    145,981.20/218,820.60 = 79,280.40/x
  3. Step 3: Cross multiply
    145,981.20x = 218,820.60 × 79,280.40
  4. Step 4: Simplify right side
    145,981.20x = 17,348,184,696.24
  5. Step 5: Solve for x
    x = 17,348,184,696.24/145,981.20
  6. Step 6: Final answer
    x = 118,838.49

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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.