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Finding the Fourth Proportional to 79,237, 109,397.64 and 70,724.28

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Solution

The fourth proportional to 79,237, 109,397.64 and 70,724.28 is: 97,644.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,237 : 109,397.64 = 70,724.28 : x
  2. Step 2: Convert to fraction form
    79,237/109,397.64 = 70,724.28/x
  3. Step 3: Cross multiply
    79,237x = 109,397.64 × 70,724.28
  4. Step 4: Simplify right side
    79,237x = 7,737,069,322.70
  5. Step 5: Solve for x
    x = 7,737,069,322.70/79,237
  6. Step 6: Final answer
    x = 97,644.65

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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.