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Finding the Fourth Proportional to 127,421.60, 175,866.18 and 84,401.60

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Solution

The fourth proportional to 127,421.60, 175,866.18 and 84,401.60 is: 116,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,421.60 : 175,866.18 = 84,401.60 : x
  2. Step 2: Convert to fraction form
    127,421.60/175,866.18 = 84,401.60/x
  3. Step 3: Cross multiply
    127,421.60x = 175,866.18 × 84,401.60
  4. Step 4: Simplify right side
    127,421.60x = 14,843,386,977.89
  5. Step 5: Solve for x
    x = 14,843,386,977.89/127,421.60
  6. Step 6: Final answer
    x = 116,490.35

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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.