Home / 128,215.79-176,937.17-70,859.15

Finding the Fourth Proportional to 128,215.79, 176,937.17 and 70,859.15

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Solution

The fourth proportional to 128,215.79, 176,937.17 and 70,859.15 is: 97,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215.79 : 176,937.17 = 70,859.15 : x
  2. Step 2: Convert to fraction form
    128,215.79/176,937.17 = 70,859.15/x
  3. Step 3: Cross multiply
    128,215.79x = 176,937.17 × 70,859.15
  4. Step 4: Simplify right side
    128,215.79x = 12,537,617,469.61
  5. Step 5: Solve for x
    x = 12,537,617,469.61/128,215.79
  6. Step 6: Final answer
    x = 97,785.28

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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.