Home / 111,509.28-153,881.76-61,207.20

Finding the Fourth Proportional to 111,509.28, 153,881.76 and 61,207.20

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Solution

The fourth proportional to 111,509.28, 153,881.76 and 61,207.20 is: 84,465.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,509.28 : 153,881.76 = 61,207.20 : x
  2. Step 2: Convert to fraction form
    111,509.28/153,881.76 = 61,207.20/x
  3. Step 3: Cross multiply
    111,509.28x = 153,881.76 × 61,207.20
  4. Step 4: Simplify right side
    111,509.28x = 9,418,671,660.67
  5. Step 5: Solve for x
    x = 9,418,671,660.67/111,509.28
  6. Step 6: Final answer
    x = 84,465.36

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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.