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Finding the Fourth Proportional to 127,278, 175,643.70 and 70,689.84

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Solution

The fourth proportional to 127,278, 175,643.70 and 70,689.84 is: 97,552.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,278 : 175,643.70 = 70,689.84 : x
  2. Step 2: Convert to fraction form
    127,278/175,643.70 = 70,689.84/x
  3. Step 3: Cross multiply
    127,278x = 175,643.70 × 70,689.84
  4. Step 4: Simplify right side
    127,278x = 12,416,225,050.01
  5. Step 5: Solve for x
    x = 12,416,225,050.01/127,278
  6. Step 6: Final answer
    x = 97,552.01

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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.