Home / 128,018.40-176,663.88-70,658.16

Finding the Fourth Proportional to 128,018.40, 176,663.88 and 70,658.16

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Solution

The fourth proportional to 128,018.40, 176,663.88 and 70,658.16 is: 97,507.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,018.40 : 176,663.88 = 70,658.16 : x
  2. Step 2: Convert to fraction form
    128,018.40/176,663.88 = 70,658.16/x
  3. Step 3: Cross multiply
    128,018.40x = 176,663.88 × 70,658.16
  4. Step 4: Simplify right side
    128,018.40x = 12,482,744,699.26
  5. Step 5: Solve for x
    x = 12,482,744,699.26/128,018.40
  6. Step 6: Final answer
    x = 97,507.43

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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.