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Finding the Fourth Proportional to 128,459.96, 177,269.42 and 70,316.28

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Solution

The fourth proportional to 128,459.96, 177,269.42 and 70,316.28 is: 97,033.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,459.96 : 177,269.42 = 70,316.28 : x
  2. Step 2: Convert to fraction form
    128,459.96/177,269.42 = 70,316.28/x
  3. Step 3: Cross multiply
    128,459.96x = 177,269.42 × 70,316.28
  4. Step 4: Simplify right side
    128,459.96x = 12,464,926,172.16
  5. Step 5: Solve for x
    x = 12,464,926,172.16/128,459.96
  6. Step 6: Final answer
    x = 97,033.55

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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.