Home / 128,019.11-176,666.26-71,430.48

Finding the Fourth Proportional to 128,019.11, 176,666.26 and 71,430.48

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Solution

The fourth proportional to 128,019.11, 176,666.26 and 71,430.48 is: 98,574.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,019.11 : 176,666.26 = 71,430.48 : x
  2. Step 2: Convert to fraction form
    128,019.11/176,666.26 = 71,430.48/x
  3. Step 3: Cross multiply
    128,019.11x = 176,666.26 × 71,430.48
  4. Step 4: Simplify right side
    128,019.11x = 12,619,355,394.45
  5. Step 5: Solve for x
    x = 12,619,355,394.45/128,019.11
  6. Step 6: Final answer
    x = 98,574.00

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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.