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Finding the Fourth Proportional to 128,153.91, 176,849.27 and 70,798.02

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Solution

The fourth proportional to 128,153.91, 176,849.27 and 70,798.02 is: 97,699.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,153.91 : 176,849.27 = 70,798.02 : x
  2. Step 2: Convert to fraction form
    128,153.91/176,849.27 = 70,798.02/x
  3. Step 3: Cross multiply
    128,153.91x = 176,849.27 × 70,798.02
  4. Step 4: Simplify right side
    128,153.91x = 12,520,577,801.00
  5. Step 5: Solve for x
    x = 12,520,577,801.00/128,153.91
  6. Step 6: Final answer
    x = 97,699.54

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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.