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Finding the Fourth Proportional to 124,873.90, 172,326.90 and 70,426.78

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Solution

The fourth proportional to 124,873.90, 172,326.90 and 70,426.78 is: 97,189.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,873.90 : 172,326.90 = 70,426.78 : x
  2. Step 2: Convert to fraction form
    124,873.90/172,326.90 = 70,426.78/x
  3. Step 3: Cross multiply
    124,873.90x = 172,326.90 × 70,426.78
  4. Step 4: Simplify right side
    124,873.90x = 12,136,428,674.38
  5. Step 5: Solve for x
    x = 12,136,428,674.38/124,873.90
  6. Step 6: Final answer
    x = 97,189.47

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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.