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Finding the Fourth Proportional to 121,031.70, 181,547.55 and 93,038.10

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Solution

The fourth proportional to 121,031.70, 181,547.55 and 93,038.10 is: 139,557.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,031.70 : 181,547.55 = 93,038.10 : x
  2. Step 2: Convert to fraction form
    121,031.70/181,547.55 = 93,038.10/x
  3. Step 3: Cross multiply
    121,031.70x = 181,547.55 × 93,038.10
  4. Step 4: Simplify right side
    121,031.70x = 16,890,839,111.66
  5. Step 5: Solve for x
    x = 16,890,839,111.66/121,031.70
  6. Step 6: Final answer
    x = 139,557.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.