Home / 100,547.38-138,820.40-62,347.51

Finding the Fourth Proportional to 100,547.38, 138,820.40 and 62,347.51

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Solution

The fourth proportional to 100,547.38, 138,820.40 and 62,347.51 is: 86,079.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,547.38 : 138,820.40 = 62,347.51 : x
  2. Step 2: Convert to fraction form
    100,547.38/138,820.40 = 62,347.51/x
  3. Step 3: Cross multiply
    100,547.38x = 138,820.40 × 62,347.51
  4. Step 4: Simplify right side
    100,547.38x = 8,655,106,277.20
  5. Step 5: Solve for x
    x = 8,655,106,277.20/100,547.38
  6. Step 6: Final answer
    x = 86,079.88

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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.