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Finding the Fourth Proportional to 72,253.28, 99,713.40 and 40,420.28

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Solution

The fourth proportional to 72,253.28, 99,713.40 and 40,420.28 is: 55,782.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,253.28 : 99,713.40 = 40,420.28 : x
  2. Step 2: Convert to fraction form
    72,253.28/99,713.40 = 40,420.28/x
  3. Step 3: Cross multiply
    72,253.28x = 99,713.40 × 40,420.28
  4. Step 4: Simplify right side
    72,253.28x = 4,030,443,547.75
  5. Step 5: Solve for x
    x = 4,030,443,547.75/72,253.28
  6. Step 6: Final answer
    x = 55,782.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.