Home / 128,547,357.84-177,421,101.64-76,365,382.32

Finding the Fourth Proportional to 128,547,357.84, 177,421,101.64 and 76,365,382.32

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Solution

The fourth proportional to 128,547,357.84, 177,421,101.64 and 76,365,382.32 is: 105,399,523.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547,357.84 : 177,421,101.64 = 76,365,382.32 : x
  2. Step 2: Convert to fraction form
    128,547,357.84/177,421,101.64 = 76,365,382.32/x
  3. Step 3: Cross multiply
    128,547,357.84x = 177,421,101.64 × 76,365,382.32
  4. Step 4: Simplify right side
    128,547,357.84x = 13,548,830,258,374,176
  5. Step 5: Solve for x
    x = 13,548,830,258,374,176/128,547,357.84
  6. Step 6: Final answer
    x = 105,399,523.46

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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.