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Finding the Fourth Proportional to 210,441.60, 315,547.20 and 85,641.60

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Solution

The fourth proportional to 210,441.60, 315,547.20 and 85,641.60 is: 128,415.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,441.60 : 315,547.20 = 85,641.60 : x
  2. Step 2: Convert to fraction form
    210,441.60/315,547.20 = 85,641.60/x
  3. Step 3: Cross multiply
    210,441.60x = 315,547.20 × 85,641.60
  4. Step 4: Simplify right side
    210,441.60x = 27,023,967,083.52
  5. Step 5: Solve for x
    x = 27,023,967,083.52/210,441.60
  6. Step 6: Final answer
    x = 128,415.52

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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.