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Finding the Fourth Proportional to 128,457.80, 192,557.10 and 58,387.40

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Solution

The fourth proportional to 128,457.80, 192,557.10 and 58,387.40 is: 87,522.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,457.80 : 192,557.10 = 58,387.40 : x
  2. Step 2: Convert to fraction form
    128,457.80/192,557.10 = 58,387.40/x
  3. Step 3: Cross multiply
    128,457.80x = 192,557.10 × 58,387.40
  4. Step 4: Simplify right side
    128,457.80x = 11,242,908,420.54
  5. Step 5: Solve for x
    x = 11,242,908,420.54/128,457.80
  6. Step 6: Final answer
    x = 87,522.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.