Home / 138,802.31-191,547.80-75,140.10

Finding the Fourth Proportional to 138,802.31, 191,547.80 and 75,140.10

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Solution

The fourth proportional to 138,802.31, 191,547.80 and 75,140.10 is: 103,693.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,802.31 : 191,547.80 = 75,140.10 : x
  2. Step 2: Convert to fraction form
    138,802.31/191,547.80 = 75,140.10/x
  3. Step 3: Cross multiply
    138,802.31x = 191,547.80 × 75,140.10
  4. Step 4: Simplify right side
    138,802.31x = 14,392,920,471.08
  5. Step 5: Solve for x
    x = 14,392,920,471.08/138,802.31
  6. Step 6: Final answer
    x = 103,693.67

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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.