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Finding the Fourth Proportional to 128,223.48, 176,939.12 and 70,862.12

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Solution

The fourth proportional to 128,223.48, 176,939.12 and 70,862.12 is: 97,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,223.48 : 176,939.12 = 70,862.12 : x
  2. Step 2: Convert to fraction form
    128,223.48/176,939.12 = 70,862.12/x
  3. Step 3: Cross multiply
    128,223.48x = 176,939.12 × 70,862.12
  4. Step 4: Simplify right side
    128,223.48x = 12,538,281,154.13
  5. Step 5: Solve for x
    x = 12,538,281,154.13/128,223.48
  6. Step 6: Final answer
    x = 97,784.60

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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.