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Finding the Fourth Proportional to 128,317.84, 176,990.76 and 83,666.32

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Solution

The fourth proportional to 128,317.84, 176,990.76 and 83,666.32 is: 115,402.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,317.84 : 176,990.76 = 83,666.32 : x
  2. Step 2: Convert to fraction form
    128,317.84/176,990.76 = 83,666.32/x
  3. Step 3: Cross multiply
    128,317.84x = 176,990.76 × 83,666.32
  4. Step 4: Simplify right side
    128,317.84x = 14,808,165,563.20
  5. Step 5: Solve for x
    x = 14,808,165,563.20/128,317.84
  6. Step 6: Final answer
    x = 115,402.24

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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.