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Finding the Fourth Proportional to 60,938.40, 91,407.60 and 54,328.80

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Solution

The fourth proportional to 60,938.40, 91,407.60 and 54,328.80 is: 81,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,938.40 : 91,407.60 = 54,328.80 : x
  2. Step 2: Convert to fraction form
    60,938.40/91,407.60 = 54,328.80/x
  3. Step 3: Cross multiply
    60,938.40x = 91,407.60 × 54,328.80
  4. Step 4: Simplify right side
    60,938.40x = 4,966,065,218.88
  5. Step 5: Solve for x
    x = 4,966,065,218.88/60,938.40
  6. Step 6: Final answer
    x = 81,493.20

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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.