Home / 272,875.20-409,357.60-85,841.60

Finding the Fourth Proportional to 272,875.20, 409,357.60 and 85,841.60

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Solution

The fourth proportional to 272,875.20, 409,357.60 and 85,841.60 is: 128,776.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,875.20 : 409,357.60 = 85,841.60 : x
  2. Step 2: Convert to fraction form
    272,875.20/409,357.60 = 85,841.60/x
  3. Step 3: Cross multiply
    272,875.20x = 409,357.60 × 85,841.60
  4. Step 4: Simplify right side
    272,875.20x = 35,139,911,356.16
  5. Step 5: Solve for x
    x = 35,139,911,356.16/272,875.20
  6. Step 6: Final answer
    x = 128,776.49

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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.