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Finding the Fourth Proportional to 70,432.80, 97,208.72 and 40,218.40

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Solution

The fourth proportional to 70,432.80, 97,208.72 and 40,218.40 is: 55,507.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,432.80 : 97,208.72 = 40,218.40 : x
  2. Step 2: Convert to fraction form
    70,432.80/97,208.72 = 40,218.40/x
  3. Step 3: Cross multiply
    70,432.80x = 97,208.72 × 40,218.40
  4. Step 4: Simplify right side
    70,432.80x = 3,909,579,184.45
  5. Step 5: Solve for x
    x = 3,909,579,184.45/70,432.80
  6. Step 6: Final answer
    x = 55,507.93

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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.