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Finding the Fourth Proportional to 127,431, 175,854.98 and 70,842.38

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Solution

The fourth proportional to 127,431, 175,854.98 and 70,842.38 is: 97,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,431 : 175,854.98 = 70,842.38 : x
  2. Step 2: Convert to fraction form
    127,431/175,854.98 = 70,842.38/x
  3. Step 3: Cross multiply
    127,431x = 175,854.98 × 70,842.38
  4. Step 4: Simplify right side
    127,431x = 12,457,984,615.88
  5. Step 5: Solve for x
    x = 12,457,984,615.88/127,431
  6. Step 6: Final answer
    x = 97,762.59

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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.