Home / 121,871.04-168,128.64-71,547.36

Finding the Fourth Proportional to 121,871.04, 168,128.64 and 71,547.36

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Solution

The fourth proportional to 121,871.04, 168,128.64 and 71,547.36 is: 98,704.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,871.04 : 168,128.64 = 71,547.36 : x
  2. Step 2: Convert to fraction form
    121,871.04/168,128.64 = 71,547.36/x
  3. Step 3: Cross multiply
    121,871.04x = 168,128.64 × 71,547.36
  4. Step 4: Simplify right side
    121,871.04x = 12,029,160,332.39
  5. Step 5: Solve for x
    x = 12,029,160,332.39/121,871.04
  6. Step 6: Final answer
    x = 98,704.01

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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.