Home / 121,999,819.29-168,317,663.58-77,972,589.64

Finding the Fourth Proportional to 121,999,819.29, 168,317,663.58 and 77,972,589.64

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Solution

The fourth proportional to 121,999,819.29, 168,317,663.58 and 77,972,589.64 is: 107,575,275.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,999,819.29 : 168,317,663.58 = 77,972,589.64 : x
  2. Step 2: Convert to fraction form
    121,999,819.29/168,317,663.58 = 77,972,589.64/x
  3. Step 3: Cross multiply
    121,999,819.29x = 168,317,663.58 × 77,972,589.64
  4. Step 4: Simplify right side
    121,999,819.29x = 13,124,164,111,697,312
  5. Step 5: Solve for x
    x = 13,124,164,111,697,312/121,999,819.29
  6. Step 6: Final answer
    x = 107,575,275.02

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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.