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Finding the Fourth Proportional to 128,602.98, 177,467.22 and 72,011.52

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Solution

The fourth proportional to 128,602.98, 177,467.22 and 72,011.52 is: 99,373.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.98 : 177,467.22 = 72,011.52 : x
  2. Step 2: Convert to fraction form
    128,602.98/177,467.22 = 72,011.52/x
  3. Step 3: Cross multiply
    128,602.98x = 177,467.22 × 72,011.52
  4. Step 4: Simplify right side
    128,602.98x = 12,779,684,262.37
  5. Step 5: Solve for x
    x = 12,779,684,262.37/128,602.98
  6. Step 6: Final answer
    x = 99,373.16

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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.