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Finding the Fourth Proportional to 128,055.65, 176,712.16 and 70,693.74

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Solution

The fourth proportional to 128,055.65, 176,712.16 and 70,693.74 is: 97,554.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,055.65 : 176,712.16 = 70,693.74 : x
  2. Step 2: Convert to fraction form
    128,055.65/176,712.16 = 70,693.74/x
  3. Step 3: Cross multiply
    128,055.65x = 176,712.16 × 70,693.74
  4. Step 4: Simplify right side
    128,055.65x = 12,492,443,493.88
  5. Step 5: Solve for x
    x = 12,492,443,493.88/128,055.65
  6. Step 6: Final answer
    x = 97,554.80

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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.