Home / 105,134.40-145,088.91-57,390.30

Finding the Fourth Proportional to 105,134.40, 145,088.91 and 57,390.30

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Solution

The fourth proportional to 105,134.40, 145,088.91 and 57,390.30 is: 79,200.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,134.40 : 145,088.91 = 57,390.30 : x
  2. Step 2: Convert to fraction form
    105,134.40/145,088.91 = 57,390.30/x
  3. Step 3: Cross multiply
    105,134.40x = 145,088.91 × 57,390.30
  4. Step 4: Simplify right side
    105,134.40x = 8,326,696,071.57
  5. Step 5: Solve for x
    x = 8,326,696,071.57/105,134.40
  6. Step 6: Final answer
    x = 79,200.49

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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.