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Finding the Fourth Proportional to 111,686.32, 154,130.04 and 61,386.64

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Solution

The fourth proportional to 111,686.32, 154,130.04 and 61,386.64 is: 84,715.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,686.32 : 154,130.04 = 61,386.64 : x
  2. Step 2: Convert to fraction form
    111,686.32/154,130.04 = 61,386.64/x
  3. Step 3: Cross multiply
    111,686.32x = 154,130.04 × 61,386.64
  4. Step 4: Simplify right side
    111,686.32x = 9,461,525,278.67
  5. Step 5: Solve for x
    x = 9,461,525,278.67/111,686.32
  6. Step 6: Final answer
    x = 84,715.17

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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.