Home / 115,038.40-172,395.60-91,386.40

Finding the Fourth Proportional to 115,038.40, 172,395.60 and 91,386.40

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Solution

The fourth proportional to 115,038.40, 172,395.60 and 91,386.40 is: 136,950.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,038.40 : 172,395.60 = 91,386.40 : x
  2. Step 2: Convert to fraction form
    115,038.40/172,395.60 = 91,386.40/x
  3. Step 3: Cross multiply
    115,038.40x = 172,395.60 × 91,386.40
  4. Step 4: Simplify right side
    115,038.40x = 15,754,613,259.84
  5. Step 5: Solve for x
    x = 15,754,613,259.84/115,038.40
  6. Step 6: Final answer
    x = 136,950.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.