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Finding the Fourth Proportional to 128,597.48, 177,459.63 and 72,006.02

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Solution

The fourth proportional to 128,597.48, 177,459.63 and 72,006.02 is: 99,365.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,597.48 : 177,459.63 = 72,006.02 : x
  2. Step 2: Convert to fraction form
    128,597.48/177,459.63 = 72,006.02/x
  3. Step 3: Cross multiply
    128,597.48x = 177,459.63 × 72,006.02
  4. Step 4: Simplify right side
    128,597.48x = 12,778,161,666.97
  5. Step 5: Solve for x
    x = 12,778,161,666.97/128,597.48
  6. Step 6: Final answer
    x = 99,365.57

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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.